****med. I was sold **** tires

I feel ****med by Hi-Q Centurion!!! I bought 2 rear tires from HI-Q in Feb 2021 and I have travelled only 26k kms since but they are finished. They said to me those tires should cover 30k- 35k kms when I bought them. When I brought this to their attention they claim I should produce a report that wheel alignment was done at every 8k km. No one communicated this with me when I bought the tires and they also failed to produce a copy of the invoice I signed that states that wheel alignment should be done at every 8k kms. My question is why are the front ones still fine when they have clearly covered more KMs than the rear one? I bought 2 front tires from them in Oct 2020, they are still fine