I think you need to see a lawyer about this issue immediately.
- Do you have any proof that you paid your parents back?
- Are the tax bills in your name or your parents?
- Do you have or can you get proof that you paid the taxes?
- Do you have proof that you paid for the remodeling?
If you're on the opposite side of this "family feud" from your parents, they may claim that what you paid was "rent", especially if you don't have receipts/proof of what you paid and for what purpose. This is why you never, ever get involved with real estate without some kind of written contract, ie a lease, a land contract, a deed, a mortgage, etc.