Bought a "certified BMW" from this store, extended...

Bought a "certified BMW" from this store, extended warranty, and had every service performed here for months. I tried to bring my car in for another appt but there was roughly a 3-week wait. I took my car to BMW Cincinnati North. This store informed me that one of my wheels had been welded. They said BMW would never do this. I asked BMW Store about this and they accused me of welding my own wheel. After asking for specific documents to proceed with legal actions, the manager said it would "behoove" them to replace the wheel. Highly unethical cost-cutting measures to simply improve their bottom line. Sell a certified car for more, then pass on any flaws not covered by warranty onto the customer. Buyer Beware.