No customer communication from MWEB

I have been a loyal MWEB customer for many years. But lately, I have noticed that my fiber speed, which is supposed to be 10mb drops to below 700kb. It then corrects itself after a few hours. There is no notification from MWEB nor Octotel (which is the fiber owner) as to why this is happening. Is their a fault that they are fixing - basically no comms. MWEB's customer communication leave a lot to be desired.