Purchase of 110 lvl boost few days ago

If I knew the 120 level boost would be launched this time, I would have waited. My character is still at level 110, and I hope you guys give compensation appropriately.
I don’t want any special drama. Please boost my character to 120 lvl. I don’t want to think I waste my money. Please consider this with the mind of the user.
You have already planned to change the contents of the product for a long time. In order to prevent unnecessary misunderstandings, I think that you must not sell the product you plan to change for a certain period of time, or give appropriate compensation even if you sell it.