I'm so sorry to see you were affected by an outage and there were no prior warnings given!
We do try to pre warn customers of any intended works where we can, usually via text, I'd be happy to check we have the correct number for you in a PM if you would like?
I have checked your account and I can see that there is now no mention of a outage which means it has been resolved. Where you given the code at all for the outage? If so I'd be happy to check and see what had happened?