eBay sent you a notice explaining what you need to do. If this was a VERO notice (sounds like it was) then you need to contact Coach as eBay will not get involved under any circumstances.
You also need to understand that trademark violation does not suggest that what you are selling is fake. Ity suggests you are using the Coach trademark without permission. Whether Coach have the legal right to stop you is another question but not one that eBay can or will answer.

"What else could I do? I had no trade so I became a peddler" - Lazarus Greenberg 1915
- answering Trolls is voluntary, my policy is not to participate.