WORST SERVICE PROVIDER EVER

Worst company ever. I have ended my wi-fi contract after 2 years when the contract has expired. 6 weeks later they took double the money from my bank account. So I have tried to get hold of their customer service. I phoned the 135 line and the just said they cant help me I will have to phone the accounts department. They gave me 4 different numbers every time that I have phoned back. NONE of these numbers exists or gets answered. I have sent 5 emails and received an automated response back with a promise that somebody will attend to my complaint in 48 hours. My first email was sent on the 16 the of April. The 48 hours have expired looooong ago. I want this contract to be stopped and my money to be paid back to me. I hope I reach somebody at MTN through this or I will have to work through the ombudsman