If your account is flagged, the investigation could indeed take several days or more, sadly. I've seen it in other casinos. From a user-standpoint, the whole thing can be very jarring the longer it takes, no matter which angle you look at.

But if it's any consolation, chipp.gg has a good repu in the forum and cares about it. They probably just need to run their usual checks. Otherwise, you have the option to open a scam accusation thread and seek help from a reputed mediator.