Create new account or Use existing WES account & same reference id?

In order to get new report, I need to create new account or can I use existing WES account and same reference id ??

You should be able to use existing WES account.

How can I use existing reference number ? again I need to do the payment ?

Off course, new assessment would require new fees.

It will be a new application all together unless WES can give you some kind of waiver.