Telkom network

I'm a telkom user and live in the orchards Pretoria....ive been having no problems with this network but since the 1st of Dec 2018 the network at home is always on 2G no please explain how am I to watch Netflix and the rest if your speed is always that slow and sometimes there's total loss of network ?....im paying a monthly fee so I can use this data not to preserve it because u can't supply me with the right speed or network coverage