Xfinity/Target 50% Discount

I’ve been receiving phone calls regarding a 50% discount on my Xfinity account for months.  I decided to answer the latest call from [Edited: "Personal Information"]; it had me call [Edited: "Personal Information"].  A person with a foreign accent answered (since Xfinity uses foreign people for customer service, I wasn’t to suspicious at first) offered no contract 3 years guarantee discount.  The message and music while being on hold made it seem like I was speaking with Xfinity.  They knew my phone number.  It sounded like a scam when they said Target was subsidizing this discount and I would need to pay the first 6 months with either a Target credit card or gift cards upfront.  It tried to dissuade me from opening a Target card because Target credit card has a $100 annual fee (that’s a lie).   Unfortunately, I gave them my zip code, which they can associate with my phone number.  Anyway, I told them I’ll call back after I get the Target credit card, which I’m not.