Afrihost / tt connect Bedfordview - no internet

Afrihost/ TT connect this December service has being really frustrating. The internet connection keeps going on and off every 5 mins since 24 Dec. My ticket RZT ***8 is still open which each time I call they tell me to reboot, the line has been refreshed. Afrihost agents solution is always to reboot and not provide you with an actual answer as to why it keeps happening. My line has been activated 1 Dec with Wan flashing. Last week an agent whom name I will not mentioned said the Wan is supposed to be stable, that is why connection is lost. ( Almost a month after installation now the Wan is an issue? Second agent said its not the Wan, the router needs to be replaced. Are the Afrihost agents even trained. Im so tired of repeating myself. Can I please get a a reason as to why the connection keeps dropping??