Is Target a scam?

My promotion had run out 3 days ago. They told me my bill would double. I could leave it alone, pay up front for 10 months, or pay 3 years up frony with an increased discount. The callback message sounded like Comcast. I went ahead and paid the 10 months in advance. The deal was you had to buy 2 Target gift cards at $200 each. Is this promotion for real, or is it a scam?