I have an open service ticket for a Rewards claim created at an Xfinity Store that is not being addressed. How can i get a resolution?

I received an email for a free Apple SE Watch. It wasn't available to claim under my Rewards account just as Peacock wasn't. I can only assume it wasn't there because of the offer being limited to Platinum and Diamond members only. I called customer service three times and received nothing but false statements and ultimately the run around. I went into the store with my email offer to claim this watch. I was able to receive the watch and according to the customer service representative and their Xfinity telephone technical support it was taken care of and I was told after 24 hours the cost of the watch will revert to $0. Needless to say my account still shows the full price of the watch on my upcoming October 6th billing cycle. I can't call customer service because they are a waste of time, so how can I get this resolved?