Bill Increases

Is anyone else experienceing increased bills for Dec. and Jan?  mine went up approx. $15. in Dec. bill and another 11.00 added on Jan bill.  When I called support they can't explain the increases but said they could give me a $7.a month discount for being a good customer.  Thats' a joke, because this customer is not happy with their prices.  Anyone having same problems.  Att will give me same amount of service for 30.00 less a month.  may change tomorrow