I assume the service department don't consider it a warranty claim so are not going to pay for a new wheel out of their budget. Also not setting a precedent should you return wanting more new wheels. I would expect the same response from the sales department, and they do talk to each other so the salesman will be expecting you or your email as will his manager. I wish you luck, but look at the situation in the cold light of day. If you had seen the damage before sale it was a negotiation point, but they have your money so don't expect much interest from them. I doubt if the loss of a possible future used car sale is going to bother them.