overcharged and debited

Opened an account with telkom. Agreed they can take money off on a certain day. They took off whenever they wanted. Got disconnected for being 11 days late on payment after having the account for less than a month had to pay reconnection cost. Then upgrade to a unltd package get confirmation at call centre and tygervalley telkom that I am on this plan. I get my bill and I am on normal weekend plan go into tygervalley they 'sort' it out and I cancel my debit order. And then my debit order still goes off taking a full 1000 whereas I only should pay 475.70 this month as arranged with call centre agent.. Call centre says its still in dispute. Waiting so long to sort something out. Its ridiculous. One fault after the other. Not one month now where telkom has proven a smooth service.