Hello again,
If I may guess, I would say that "OP" refers to you. Please check this statement the casino added to your complaint:
So I assume that "P" goes for "player".
The casino also suggested that you've submitted more complaints related to the same issue.
Well, I don't want to repeat my question, but is it possible that you use some app for safer browsing, some additional protection with multiple options that can somehow alter your location? Because the original purpose of VPN - virtual personal network - is to provide enhanced security for users while being active on the internet.
I just can't come up with anything else at the moment.