Horrible Terrible Service Received

For the past 100 years I have been on a compact package paying about R574 monthly since last month I am billed R2351 don't know what changed. I was not informed and ever since I am trying to find out what changed. None of the *********** staff can give an answer or fix my bill. Then they debit my account with R1274 for what they can't tell me. All I am asking is there someone that can help or should I just cancel my subscription. Is there any chance someone cares because they don't call me back or respond to my emails and telephone calls.