WORST SERVICE

I was sold a contract under false pretentious and luckily enough, i realized soon and returned the product the very next day. Telkom sent out their courier to collect the parcel and everything, this all happened in April 2017. It's December 2017 now, i called in a million times already asking why i'm still being billed for a product that I don't have and a product that was returned during the cool down period. I've sent in a cancellation form but still haven't received any feedback. I find this highly annoying and unprofessional. It's ridiculous that I have to pay for something that I don't have and that my cellphone contract and credit record should be affected by this!!!