Quidco Cashback Help

[#1]

Hi,
I'm trying to fill out the Cashback Claim form on Quidco (as it didn't track), and it asks for my Name, Account Name and Account Number

What would my account number be?  I tried the Service Number from my order, but it has to be under 7 characters.
Help?

[#2]

My Service ID shown on invoices is printed with 8 digits but the first two are zeros. Would dropping leading zeros provide not more than 7 digits for you?

[#3]

That's the only thing I could think of too.
It will "go".  So I'll do that.  Thanks.