Pulling my hair out over this service

I am already with Virgin on broadband. On the 11th I signed up to Volt O2 sim and cancelled my sim in EE. Yesterday I received an email from 'Virgin Media Websales'.

The email said "We'd like to talk to you as it appears that some information that we need to process your order was missing. This will help us take the next steps towards getting signed up, so just call our team on 0845 650 4500."

I tried this number and it didn't work, it says its no longer in use. I tried calling Virgin but the switchboard kept taking me round and round in circles without letting me speak to a bloody human!! And then it hung up telling me I can get help online!! I tried the VM webchat and the unhelpful person on the other side took 10 mins each reply just to tell me they cant help and I need to talk to someone at O2.

I called their support and they said they cant find anything under my name, number or email on their end and to contact Virgin!!!

I am literally at my wits end with this customer service and about ready to take up EE's offer to stay with them and cancel my broadband here too. They will pay for cancellation fees and all.

Can someone please help me sort this issue out as the alternative is me going to the FOS for a complaint and cancelling my service with Virgin.