Cant get hold of Vodacom to cancel my contract

It is such a mission to cancel my contract with Vodacom. I feel like they do this on purpose to keep on making money. I moved to the united states of America and struggle to get hold of anyone on the retentions department. My contract expired in August 2017, that being said, as consumer I am entitled to cancel my contract in writing to Vodacom. I have sent them 5 + emails to their retentions address where I explicitly write to them with all my details to cancel the contract.

With no response back I spend 30 minutes on hold with their retentions department on numerous calls from overseas costing me a lot of money!! Still they continue to debit me monthly for the contract? How can I cancel my contract if I cant get hold of anybody?? Next step is Social media and lawyers.

VODACOM, PLEASE CONTACT ME IMMEDIATELY!!!

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