Can you please assist me to get my old tyres back.

I went to Tyremart on 21.12.2023 to buy two new tyres and install two new tyres. When they finished installing the new tyres they took my old tyres without my consent and I went to the shop on the following day 22.13.2023 - 09:15am to enquire about the whereabouts with my old tyres and they told me the tyres are no longer available .