Apple Watch Rebate not applied

On August 1st I went to the Xfinity store to get 2 new phones. I was told about the Apple Watch promotion since I was a Diamond Member. The store employee was not able to apply the rebate code but promised me a ticket was filed and the rebate would be applied. It is now November.  After 6 visits to 2 different stores, 2 calls to customer support (over 2 hours on the phone), no one can resolve this for me.  I have been promised over and over again this would be resolved - by store employees, managers and customer support. No one has solved this for me. What other options do I have?  

If this cannot be resolved I will take my business to another carrier.  

Thank you.