Purchase awaiting verification even though I've been buying of this site loads before

I’m currently awaiting my ID to be verified for a purchase, I don’t understand why I’m now having to do this check as I’ve spent a hundreds of pounds already beforehand.

Can you please look into my order and verify it?

Hi Andy, did you receive a message/email from Gameflip asking you to submit proof of identity?

Yes I did and I have I’m currently waiting for it to be reviewed but I currently have two purchases I’m waiting for

Ok, if everything you provided is accurate and checks out, all the holds and reviews will be lifted. These reviews can happen to anyone, new users and old. This is done so that both buyers and sellers are safe from someone else using their payment to rack up a huge bill.

Do you know how long it usually takes? One of my purchases was a game I’ve been itching to play