There is a wrong basis in how you asked your question, I will be a little rough because I want to make it clear how important it is to be serious and sincere with Satan in Satanism. But know that Satan is understanding and you don't have to feel guilty, but it's very important to get the right message across, so I'm going to be very blunt, direct and even a little strong in tone. Don't see this as an attack because I will eventually tell you that you can simply be honest again from now on, but it is important that you understand the importance of this first, okay?
If you promise something it is assumed that you have done it because you know what you are doing in sincerity.
Satan is here as a loving Father; he is not your employer who feels it is his duty to give you things in return.
Satan doesn't really want anything from you, he doesn't need you to promise him things that he wouldn't already be able to take for himself, and usually what we do when we serve Satan is always stuff that is good for us and not things that can determine whether Satan is more or less infinitely even greater and Divine.
People cry if they have to donate 10 euros to JoS, and when they do, they feel like, "Did you see that? The Gods should thank me," but it is the people who should be thankful that if Hp. HoodedCobra666 does everything he can to update the addresses of crypto wallets... because if JoS stopped existing due to lack of resources, all the spiritual gifts from the Gods that these people live happily with would disappear.
Do a Ritual of Power to bless an almighty God and you gain every blessing from him, more than the almighty God could get if you didn't even exist. No, Satan does not come to you and beg things in return.
If you go to Satan and without him even having asked you anything you promise him something that will surely do among other things much more good for yourself than it does for him concretely and that he would be happy about just because the thing would make you feel good (for example if you promise that you will meditate more, do you think Satan is more glorified if you meditate? It doesn't change anything for him, he just wants your good and so he's just happy that you want to do good for yourself, but on his planet if you start absorbing energy in the chakras it really won't change the motion of the planet itself), it assumes that you keep your word, your promise, etc. not that either the Satan-of-the-lamp grants you the wish you didn't even ask for or he should just be silent to constantly take you seriously whatever you say even though keeping it will be completely optional because your word has more or less nothing reliable before the Sacredness of the Gods.
A few weeks from, I had to sign a document for the university in which I formally attested that one thing about the graduation session that was not true (i.e., that I was willing to abide by the rules of the graduation session), was true instead, I would not be able to get my degree if I did not sign the fucking useless document that I could care less about than the level of the underground.
I didn't want to sign it at all, because I thought, "If I sign something that I blatantly don't want to comply with, how is Satan going to take me seriously for that time that I signed allegiance in the dedication of my soul?" My parents had to catch me in a moment of stress where I didn't understand what was going on in order to get me to sign, that's a very extreme example of mine, certainly I could easily sign a stupid university document and Satan wouldn't even notice (at the level of interest of the thing) as long as that was my academic good, but it's to make you understand that it's really holy what you say to Satan.
Now don't feel guilty, you got it right, next time keep your word and remember that if you are truthful with Satan, Satan will have a way to figure out how to deal with you to guide you to your truest happiness, if you say things but don't even keep them, there is no actual understanding of what you sincerely can do and want to do and what you don't.
Typically those who do not tell the truth never know when they really need something. So as of now be honest with Father Satan and remember that he doesn't ask you to promise him things so if there is a 10% chance that you may not be able to be truthful and therefore you are not 100% sure that you will be, avoid making "promises because I'm cool if I promise something like in the movies, even though I actually have no fucking idea how to value the thing."
Now that you know that Satan holds your honesty in high regard, from now on be honest, Brother, please!
Be blessed and good luck!!!!!