Most account takeovers start with someone persuading you to hand something over, not with a system being broken into. This page is about spotting that.
If a message does any of these, it is not from us, however convincing it looks.
Sign-in needs your password and a one-time code sent to your email, so a stolen password alone is not enough. Your password is stored hashed, not in readable form. Every sign-in is recorded, and you can see the history on your account.
Freeze your cards, change your password, then email support@grenvillecapitals.com. Do the first two immediately; they do not need us. Tell us what happened and we will freeze the account while we investigate.
Reporting early matters more than reporting neatly. Send us a short message now rather than a complete one later.