Help accessing my account

So I rejoined Virgin media broadband on the 7th of August, prior to this my sister who lived at the same address as me had a VM account when she moved to another place she did not cancel her account. So I had to call VM to cancel her broadband contract so I could start my own contract. I did this via phone, I thought everything had gone smoothly as I received my new home hub the same weekend.

However I never received a welcome email with my account number and area code etc.  Since I had been busy I didn't think too much about it, now for the past 2 weeks I've been trying to access my VM account, I've tried calling in to get help but each time I call they say they will send me my details to my email but I event received anything.

Not only that but they have taken my last name down incorrectly twice and despite saying they will change it they never do, I have been told my account number twice, both times the number was different. And to make it all worse I believe they are sending emails to the wrong email still. 

I have tried many times with all combinations of information I've received to link my vm account and access my account but I always get: "We can’t find your Virgin Media account." error.

If there is a VM employee or helper i need help to correct all my information and access my account. I have not been sent any of my bills to my email or had a welcome email with my information. I need these sent to the correct email asap.