I know how you feel about doing the same thing a year ago, although the damage I caused was much more serious because I mistakenly heated and flattened my little groin tears and made it worse by using tpe filler The area of a real sex doll. The good news is that I believe that this kind of damage can be repaired using the methods detailed in Mishka’s tpe repair thread.
For best results, I suggest you use a variable thermal welding station (buy my mine from eBay for £ 20) and then practice the technique used by Mishka, which works with small pieces of tpe as you gradually Work it into the damaged area and build a layer of tpe. If you look at this link, this is my personal experience.
I didn’t forget to make sure you do any such work in a well-ventilated place, and you will need proper masks to reach toxic fumes (3 million euros are affordable and available from many eBay sellers). Hope this helps and good luck! I’ve seen your thread several times, and the fixes you made to real sex dolls are not very noteworthy.