Cheater Representatives & Cancelling Subscription

I went to AT&T store in State Street, Madison, WI on 23rd Aug to select Internet service for my new apartment. 

The representative has told me that if I enrol into the $50/mo ATT TV NOW plan, I can have the remission of the $100 installation fee. The representative also reminded me that this $50 includes Internet service. I confirmed several times that I can cancel this service after this month's subscription and return to normal Internet plan.

I also confirmed several times with the representative that I only need to pay $50 for Aug-Sep, with the TV service and including the Internet services. HOWEVER, my credit was deducted by $60 for the Internet （I NEVER SAID I WANT THAT PLAN）, which is supposed to be included in that $50. Moreover, this afternoon I received a notification that another $50 was deducted from my credit card for TV services. Hence I pay in a total $110 a month.

So the thing is:

1. The representatives promised that they would set me into the $40 monthly Internet plan (after the first month). But they DID NOT.
2. Instead, they deliberately put me into the $60 monthly plan immediately without my permission.
3. The representatives promised that I only need to pay $50 for this month. But my account was automatically deducted by $110.
4. I need a refund for either or both of the services for it is not my fault but the cheating behavior of these representatives. Totally unsatisfied with this store.

(Tax issues excluded in this post)