Welcome to our Community and thanks so much for your first post - I was sorry to understand that you're having some issues with your broadband currently. I have located your account from here and I can see that you're currently impacted by a known area issue that would explain the issues you've experienced.
The issue has been raised under reference number F008000973 and at the time of writing, the estimated fix date is listed as 23rd Feb 2021. I have ensured that the issue has been logged on your account for you.
I can also see that your Hub has not been rebooted in around 2 weeks so please also reboot when you can to get the best from your services during the known area issue.