Vodacom poor service

I requested several months ago to have my contract cancelled. I was convinced or rather coerced to take a lesser-valued contract. I decided to go ahead and then RAM refused to deliver on my only form of proof of residence which was a letter from home affairs, RAM says that is not proof. I then decided that I did not need the contract and decided to go ahead with the cancellation. Despite me emailing and being in touch with vodacom they have been continuing to bill me. I have not been putting money into the account that my cell phone is on because I had cancelled the contract. Vodacom has since been billing me despite me reaching out to them on email . Not only has this racked up a 2500 bill that I am sure they want but also is incurring bank charges for return of the debit order. I am now without a business line because the line has been suspended and missed important communications that has cost me money. I am unable to make this a pay-as-you-go because of the outstanding balance of the account so will still be without a business line while Vodacom continues to ignore the cancellation and subsequent emails that have been sent