Bought Apple watch using $300 rewards. BUT never realized that I am GETTING CHARGED $23 per month.Paying premium for a supposed free watch?

Back in November or December of 2023, I used Xfinity Rewards (platinum) to use $300 towards buying an Apple watch SE. The agent at the shop was very condescending but I avoided confrontation and ordered my watch with her using the code (which i kept a copy of in screenshots).

Last month i was reviewing my statement and realized I am paying $13 and $10 for a FREE WATCH?

I called and was transferred to India call center who were of no help and said this is what it is.

Xfinity/comcast, put yourself in my shoes. I am a consumer with a $300 coupon and have been billed $23 per month for the last 5 months. I cannot charge back, or complain since no one is listening.