T Mobile Survey Scam

Back in December of 2021 I foolishly took what I thought at the time was a T-Mobile survey, said I could pick a gift, I just had to pay the $6.96 shipping cost.

I got a call today, 6/01/22 from a number identified as NBC 10, Bala Cynwyd, PA

The rep was telling me I owed $119.00 since I did not cancel my High Smart Watch Plan. She said the watch was only free for 7 days. I really feel this was a scam because when she called today and I debated with her the whole situation, she kept talking over me and not letting me tell my story. then she says well since I am a supervisor here I will cancel your smart watch acct, but you will l still have to pay us $71.00. She said if I didn't, it would be reported to a collection agency. At that point I hung up on her.

I have never in my life had bad credit, I really think this is a scam but if I get a call or a notice from a collection agency who should I contact for help and guidance with this situation?

It must have been VERY FINE PRINT because I saw nothing of that, it was presented to me as a reward for doing the survey. Then to top it off, I accidentally clicked to look at  the GPS they were offering for $40.00, I ordered it by mistake I called the company right away and cancelled the GPS she said she could not not cancel the Smart Watch so I said ok since I only had to pay for the $6.96 shipping cost. Then the next month a charge appeared from a company I never heard of for $40.00 on my credit card. I called my cc company and they credited me the amount. They also recommended I cancel this CC and they would send me a new one.

I also called T-Mobile after this happened and they said they do not send out surveys like this with reward gifts promised. Any advice?