Landis Refining Co. review: Scrap dental gold, silver jewelry, assay of materials

I had found some scrap dental gold, some little pure silver bars, old gold rings. As a retired dentist, I am familiar with gold alloys, should have silver or palladium and sometimes small amount of platinum. So, they advertise they take jewelry too. Requested assay report also. Got nothing back but a check for gold. Called up and was told only pay for gold. I never would have sent this scrap there, if I knew ahead of time they only cover gold. Essentially they stole my silver and other metals that should have been assayed. Crooks in the industry. check dated 5/26/23 Invoice 677615. Check #130856