Dealer denial giving back old parts - CA

Need inputs - Can a dealer deny old tires/tire giving CA legal reasons - I had a tire replacement from a dealer and dealer denied giving back my old tire which I need for my backyard project…

Can someone shed some light on this.Are there some legal concerns not giving the old tire back in California? Is there someway I could verify.I am already not happy with the treatment of this dealership - which has bad customer service.

Please advise.

Did they charge you a tire disposal fee?

Yes I do see it on the Bill

Hello All ,@chrispbacon - Any insights on this will help

That would me they disposed of the tire.

It’s toast …