I signed up at ATT lied to me

I signed up for $80 a month cable and internet in store with an online promo that was sent to me. I have had THE WORST experiences call AT&T for help with my bill and I feel lied to and overcharged. Someone was supposed to call me back Friday and never did. Paula that I spoke with was the worst. I wish I could get out of my contract and never do business with ATT again. I’m going to learn from my mistake and tell everyone to avoid them like the plague. This is just awful and such a waste of time. Shame on them for having such a bad business and customer service. THE WORST.