False information

I took out a mobile data contract because I live in an area where I could receive data directly from Telkom and if out of the area could receive data on roaming through MTN. Well that is not true. I can see the cellphone mast but not once have I been able to go out of roaming which is 1) unbelievably slow and 2) I am continously dropped and unable to get on to the Internet for hours at a time. If I do get on it's usually 2G and unacceptably slow. Telkom has a map showing where their reception is and I cannot get any reception in that area. I logged a complaint a month ago - case ***0 and then asked to cancel the contract 2 weeks later - case ***1. I have had no response and receive no help in the branches.