Bridge of contract and refusals to refund access amount, horrific service

Vodacom double billed me for and refuse to refund my money instead they paid themselves upfront for 3 months, I called emailed I was transferred to pillar to post from the 29 till today, to make matters worse their contract cancelation department does not do cancelation, vodacom has no ethics and they bridge contracts, they are a nightmare to deal with and to be trusted. I upgraded a contract and terms and conditions read to me but agent did not capture the information, how is that my fault? If you read me terms and conditions and don't keep those terms you are in Bridge of contract.