VODACOM IS ON ITS WAY DOWN/BAD SERVICE

O my word! I have been a customer from Vodacom for over 10 years. At one stage I had about 5 accounts with them. But there service started getting really BAD. I started canceling all my contracts one by one. The last one I decided to keep. But this is the 4th or 5th month I had to phone in to update my banking details and yet it is still not done. And every time that a debit order does not go off I get charged R175.00 per transaction. I decided to cancel this contract also and phoned in about 4th or 5th of June and today is the 21st of July and what a surprise my contract is still going strong. The best part is they are refusing to cancel my contract because the last installment did not go off because they again did not change my banking details ...Let's do the math I owe them R500.00 my debit orders cost me for let take the lessor of 4 months R700.00 now my question is who is in the wrong . AND FOR CONVENIENCE SAKE THEY DO NOT HAVE A RECORDING AND I CANNOT GO ON PHONING SINCE THEY ARE BLOCKING THE ACCOUNT OUT OF THEIR OWN NEGLIGENCE