Poorest service ever @Telkom

I ordered 2 gadgets (samsung galaxy core prime & Huawei tablet) from Telkom through Selldirect upon being offered to renew my contract, most terrible mistake of my life. The simcard that comes with the tablet has never worked and i have been trying to get assistance from day one, but because the renewal was online no Telkom store around the whole of Durban could help me, i kept on being referred to write to Selldirect & Telkom head office. For about 6months i have been paying for a tablet that does not have any data bundles when i called Selldirect to take it back within the same week i was told that once the product is open they cannot take it back, my question is it is my fault that the simcard is not working? Why am i still paying for it?. Finally i decided to stop making payments for a device that i am not using so my account became in arrears, how am i expected to pay for this tablet that i am not enjoying any benefits of? Upon seeking assistance i have been made a fool of and turned away at each Telkom store when seeking for help? Instead asked to email @customer complaints which never replies and always says "Inbox of receipient full"

Very very disappointed.