Over billed after telkom moved my line down

I have been phoning so many times lack of any support I was moved down to a 4 meg line because telkom is to useless to make sure all of centurion have proper speeds ever since I have been moved down from the 10 meg line (buy a telkom official)I am still billed for 10 meg line its been months of phone calls and months of trying to rectify this <br> <br> Well since there is other internet options available I will not pay my account until every cent is paid back to me or I will just find a new internet provided wireless options is available <br> amazed at lack of assistance is all I can say