No 3G connection in area!

i recently moved to Johannesburg and on first chance went to Clear Water Shopping mall to take out a Telkom Mobile Data contract. In the shop and on my pc we verified that I had 3G and LTE connection at the address where I live. I took out the 15GB Smartinternet plan. When I got home I tried to connect but it turned out there was barely any signal where I live. I phoned Telkom many times and each time I have to explain that I tried everything to test all possible ways but there is no connection, they then said they logged a case and someone will contact me to help. After 48 hours no one has contacted me. This is unacceptable as I took out the contract on the basis that there is coverage in my area. Please help!