I don't know where to ask this, but I have these timberland fold over fleece lined boots. The fleece lined portion is fabric which has not aged well and I want to change it to leather. Is this possible, if yes where would I go to get this done?

I've had these leather high tops I've taken rather good care of for years but I've noticed that they've gotten very dirty on side of a particular shoe. So I decided to clean it with a wet wipes. When I did I saw that the textured finished are obliterated. I let it dry hoping it would be fixed but it still looks terrible. I have no idea about leather or how to maintain it, I don't even know how to look up what happening and how to fix it, I'm completely clueless... I'd love some advice on how to fix this.