Apple Watch reward

Hello,

Xfinity online agent offered me a reward for staying a loyal customer for 9 years . The reward was $300 off an Apple Watch. I was told that it's completely free and that I do not have to pay anything. I repeatedly asked the agent if there will be any additional cost in my bill.  I was told that if I choose to activate the watch, then I have to pay $10 but I can keep the watch without activation.  If I choose to activate then I can use my iPhone 10 to activate the watch.

Now it looks like I have to pay the $10 every month even if I don't activate it.

A new agent tells me yesterday that if I don't activate within a month, I will be charged $300 for the watch.

On top of that , to activate the watch I need to have an unlimited plan and Im currently using by the gig.

I feel like Im being scammed by a reputed company with all the false information. I just want to return the watch but it it outside of return period.

Could you please suggest a way to resolve this?