can’t make an account

When I set up my contract I never received an email or an account number or area reference. I then later recieved a text message from virgin telling me that my email address no longer existed so i had to register but I cannot make one due to having no account number or area reference. After about 30 mins on the phone about a month ago I managed to get through to an actual human and I explained my situation and was told that a letter would be sent to my address with a code to be able to set up my account over the phone. I still have not received this eventhough I was told i would receive the letter within a week. Also, my direct debit is no longer working to pay so I now have to make payments over the phone and I have to pay £7 more each time as they give me a late fee. I am so unhappy with my experience that has been ongoing for months.