Afrihost pure LTE internet fustration

I am in Middelburg in LTE reception area. During day time hours I have Internet, but after 17:00 the connection worsen till nothing at 20:45. I logged numerous faults with lots of promises made, but still no internet. This is going on for more than 4 months. Afrihost are full of promises but very baf at delivering. They advertise pure internet joy, but it is pure internet fustration