Beware of COX third party phone Contractors

I have been very happy with my internet service which started on August 1, 2014 until I received an offer to add cable TV(a week after) which I really did not need. When I decided to cancel the TV promotion and keep my original internet service, I received a call from a third party Cox agent that convinced me to keep the cable and the internet with a discount that amounted to about thirty percent. I agreed and when I checked my e-mail, it showed my internet was downgraded but the representative made it clear I was keeping my preferred service plus the cable TV. I have been on the phone all evening just trying to get my original preferred service the way it was last month when i signed on with Cox and it has not happened. I called later this evening and the representative said he would connect me to the sales department knowing fully well they close at 8:00 pm. I even offered to pay for the entire year of service so I do not have to spend my evenings with Cox internet representatives.

Does anyone have suggestion(s).