Unresponsive Terrible service, ******* price for "premium speed fibre"

Ive sent a few emails to Afrihost over the last week, regarding the fibre line and line speed. i haven't received a single reponse or acknowledgment. i tried there whatsapp line and was responded to 6 hours later asking if i still have a query. who waits 6 hours for a live chat reply? i even emailed a screenshot of the <1mbs line speed ive been experiencing each night. My issue: I have the 50mb fibre line which i just downgraded to 25mbs line. over here last few months Ive noticed that my line speed is never consistent. even sometimes less than 1mb. Ive been paying over R1000pm for a "premium uncapped and un-throttled speed" and to have such low speeds daily, is not acceptable. i refuse to have to restart my modem each night or have terribly low speed as its not the service or contract i signed. i understand speeds can be erratic but each day to be <1mbs when you pay for 50mb unshaped fibre?? and for that price? rather refund me my money for the failed service. i have speed test screenshots to prove this. its a ridiculous service and totally not in line with what i pay for. the least i expect is a reply as to why this is the case. dont ignore my queries and claim to offer great service.