Telkom cellphone contract

Good day. I took out aTelkom cellphone contract which ended in November 2017. I then sent cancellation forms to them on 1 December for cancellation. Since then I have phoned Telkom 3 times, and sent about 6 e-mails each time to an e-mail address they give me. The last lady from Telkom I spoke to said I must send the cancellation forms while we are on the phone. Her e-mail address is simelaz1@telkom co.za She then said that she recieved them and that she will do the cancellation. That was on 7 May 2018. Telkom deducted money from my account again this month on the 15th of May. Nobody responds to my requests. Telkom just keeps on taking my money and they dont stop my contract. What should I do. There is no Telkom shop in Parys. I also requesred that Telkim pays my money back into my account.