Slow internet speed

I have been a telkom lte customer for quite some time. For a while now the download speeds go from 8,76 Mbps during the day and around 0.54 Mbps after 5pm and up and down till the next morning. I have logged 2x complaints and after a couple days I get a message telling me the case is resolved. Nothing has been resolved!!! Excuses from telkom range from load shedding, router settings and people are at home after 5pm and that's why it is slow. Really? Telkom is or throttling the speed or just plain ***********. I pay for lte and not after 5pm gprs speeds. If I can get around 8.76 mbps then I should get it after 5pm as well. No excuse! What if we start paying for what we receive??? I will be able to half my monthly bill. If they can't sort it out then we need to call it a day so that I can go elsewhere.