No 3g coverage / hardly any 2g coverage

I bought the 10gb + 10gb data sim from telkom, and everything was fine for the last 12 months, but I have just moved to a new property less than 5km from my old house, and now I dont get signal. The biggest problem is that my Cellphone contract is also with telkom, so I struggle to make and recieve phone calls, and I hardly get any internet connectivity. This is very disappointing, I am in a busy suburb with office blocks and shopping centres, I should at least get 3g connectivity.<br> <br> Please resolve this telkom as soon as possible.