pathetic servic

I received a call from a sales person in February offering me a sim only data contract My sim card was delivered on the 3/3 Then on the 19th of March I called Vodacom customer care to report it lost, to my surprise I was told it was not a data sim but it a voice sim(airtime), data was just a once off valid for 30days. I was then referred to Mondo Telecoms,I told them the whole story and requested to cancel the contract as I was sold a lie , I was promised they will listen to the call , it will take 5-7 days and they will revert back to me , No call back as promised, no email received from Mondo My account was debited R379.01 in April, I then emailed *** on the 29/4, on the 30th a consultant rep**** to my email requesting for my email address, consultants name is tyrone murugan his email address is *** ,today is the 11th , he hasn't responded to my email and guess what I have received an invoice from Vodacom again Please cancel this contract, MTN assisted , I'm happy with their service