EGG loan reclaim- lost account number

Hi there. I've recently written to EGG (or whoever it is at Canada House that you contact now that they don't seem to exist anymore!) as I seem to remember being told I had to have PPI when I took it out and they have written back saying they can't do anything without my account number. I don't have any paperwork- other than old bank statements with the regular direct debit on. Underneath 'EGG BANKING PLC' there is an eight digit number followed by a forward slash then another eight digit number ie 22222222/33333333 (obviously not the real numbers!) Could one of these be the account number? Or even the whole thing? On the form they have sent me, there is a box that says 'What is the policy number of the payment protection insurance you were complaining about?' But that is the only section that asks for any kind of account number-so I'm a bit confused all round really. Can anyone help please? E x