Target scam still going around

I got a call from a number claiming to be Xfinity offering a promotion discount with Target. Pay 1 year upfront (600$), and then my bill would be 50$ a month for 2 years after the first year. 

Several red flags here:

1) wanting to be paid with prepaid gift cards of any kind

2) provided a number for xfinity billing dept that did not match any of the numbers I could find online

3) Did not send a text with authorization code to access xfinity account

4) They were very pushy when I said that I would not be able to get the prepaid cards until tomorrow (I knew it was a scam already)

The big concern I had about this call was:

1) They had my personal information

2) They new my autopayment schedule and how much was due on my next payment and previous payment

3) They were able to post a payment to my xfinity account (they use a fake bank account and the payment will bounce in a day or 2 and you get stuck with additional charges and making the payment as well)

I called Xfinity and spoke to their security team to create a ticket to have this payment removed from my account so that I would not be charged a bounced payment fee or have it mess up my autopayment schedule.