You have to make the affirmation correctly for yourself, but it should include things such as "in a safe and positive way for me", although healing is a good thing you still should make sure that you are safe, so if you are cautious, then you might add "in a safe & positive way for me". Also include "now, contiuously and forever", and similar things. You can and should use SaTaNaMa for healing specifically, and add in SATANAS which is a powerful Word to use which can be used for more or less anything; also add AUM to the end, which is like "so mote it be" - AU is gold, and the Sun is gold, so AUM is powerful in that sense.
None of these are Runes. You can check the Runes yourself.
This is only an example of an affirmation -
In a safe, positive and beneficial way for me, my hearing in my right ear is restored fully to perfect working condition, now, continuously and forever.
Make your affirmation yourself, correct for yourself.
Doing healing work can take quite a while, and it can also take a lot of work. Unless you are exceptionally powerful, it will not be done in one session. You should do visualisation in the working, with bright white light clear and unobscured in and around your ear, getting brighter and brighter. Higher repetitions of the Words above, of multiples of 9, are better, but make sure you can handle it and that you won't be interrupted. It might very well require a 40-day working for this, or another 40 days, but do focus on the healing happening now, not in 40 days' time, and don't focus on it taking a lot of time and effort and energy, because this will cause it to take longer; focus on the healing happening now, regardless of if it takes longer - and it should also be best if you continue past the point where you think the working should be stopped because you think you have been successful; continue on longer, even if you think it has worked, just to be extra certain. You should do the working every single day, without any interruptions or breaks in the days or skipping or missing any days, and preferably 24 hours apart, and not starting the working during a Void Course of the Moon.