The Pep Boys review: Tires

I bought 4 cooper Adventurer All Season tires on 9/25/23 installed on 10/03/23. I noticed on 10/25/23 coming out from a store that there was a small bubble on the side wall tire. I called Pep Boys and told them about the defect, and they said they would look at the tire. I brought it up to the store and they would not do anything about it, they said I should have bought road hazard insurance which he tried to sell me. I did not hit any potholes which he was claiming I did. I only drove 410 miles and I'm stuck with a defective tire; He was extremely rude and told me to go wait in the parking lot after I didnt but insurance