No Signal - Paying for service I cant use

Hi , I had a 10Gb LTE contract for over 2 years and it was working fine (although there are no LTE signal but only 2G and 3G - which I am happy with) After the contract expired , I just upgraded to 80Gb data but since then I don't have any signal. I phoned the support centres and waist my time for hours trying all kinds of settings. I then logged 2 calls on the Telkom website but as yet, nobody even phoned me back to help. In the meantime I must just pay for something I cant use. I need for someone to come out to my farm in Naboomspruit and test . On the Telkom coverage map it still shows that I am suppose to have roaming 2G/3G signal. If only I could roam onto the Vodacom network but it doesn't work. If they cant resolve it , I want my money back that I spend so far as well as to end the contract.