Uber Driver Stole My House Keys

Uber driver confirmed I had left my house keys in his car - then refused to bring them back. Obviously I offered to pay. Won’t respond to messages or calls. Uber’s response was that he had confirmed he had returned the keys. When I told them that he was lying and I was going to lay a ******** charge, they did not bother to respond. We have had to change our locks and garage fob setting. Uber completely washed their hands off the issue- even though they have put my family at risk. No mechanism to discuss with anyone. Absolutely diabolical lack of interest.