Afrihost LTE sucks

Have been using Afrihost LTE for some time now but the last 2-4 month I have been having MAJOR issues after 19:00 every night where my speed that usually is around 30Mbps drops to 2-3 Mbps. Have logged complaints about this, including screenshots and every bit of info you can imagine. Only feedback I get is: "We will forward to our LTE team" a month later and I still have the same problem.