Has their support said anything as to why the withdrawal has been pending for a week? As far as I know, this isn't the first time the gamblers on their gambling site have complained about their withdrawal being stuck, and if I remember correctly, the reason as to why their withdrawal was stuck was due to the gambling site's hot wallet being empty(or something similar to that).
The other possibility could be the respective account put on hold for verification which will be completed once the user submitted what the customer support ask them to do and this could be the possible reason for the pending withdrawal not the hot wallet being empty because no other user arise such issue and if the casino's hot wallet dried then every withdrawal request will go pending and this thread would turned into a crazy mess.
No one from bitvest has contacted me and I don't recall using any email address to sign up so I don't know how they would contact me to ask for KYC. I tried creating a support ticket just now.