Business ProfileforKB Tires

I brought tires from KB Tires in May of 2021. I asked for 4 tires and an alignment. As I left I noticed the price to be lower than the quote I was given over the phone. I turned around, went back and inquired with Keith. He said that he forgot to add it but could do it of I was willing to wait. I sat and waited. I saw my car move, but never on the rack. Before leaving I he told me that there would be no charge because its was his mistake. Less than 5 months I notice that my tires were wearing. I went to Mercedes and they told me the car was out of alignment. Told them I had just bought a set of tires & had alignment done. Got back & make sure it was done & done properly. I called spoke with Keith. He told me too bring it by and once looking he replaced on tire. I asked him about the others & he said that he was not going to give me a free set of tires. I told him that they're not for, its what I paid for. Keith said that he would check the other tires once the car was on the air. Said he forgot. I feel that he looked and is trying to let the warranty wear out so that I would have a reason to purchase a new set of tires. I have purchased tires from him in the past and not had this issue before. I paid almost $900 for these tires & they don't last 5 months...really. I don't know what else to do, but what Im not going to do is spent another $871.84 over there.