small claim court

You do not have to repay someone for gifts he or she made to you.  However, it is unlikely that the other person will admit that they were gifts.  For example, the other person could claim that he loaned, not gifted, these things to you.  The other person could claim that you agreed to pay for the "gifts".  The other person can claim that you defrauded him or her into making the gifts, etc.  If your ex asserts one or more of these claims, who wins may be determined by who the Judge believes.