Xfinity Target Promotion Scam

I encountered a sophisticated scam where individuals impersonating Xfinity representatives contacted me. Alarmingly, they bypassed standard two-factor authentication and instead verbally confirmed my identity using readily available personal information, including my address, phone number, Xfinity account number, and current account balance. They also possessed details about specific promotions on my account, including the discount amount and expiration date. The scammers attempted to lure me into a fraudulent scheme involving a purported partnership between Xfinity and Target, offering a 50% discount on internet service if I prepaid for a year using a Target gift card. When I declined, they followed up the next day with threats of account penalties.

Unfortunately, after communicating with the scammers, I did receive a text from official 615-91 (Xfinity), which asks me to provide feedback from 0 to 10. Does it mean scammers have access to Xfinity systems?

Scammers contacted me from: [Edited: "Possible scam numbers"]