Regardless OP having other account or not, it is a well known [I've mentioned it numerous times, across different rollbit-related threads] that it's Rollbit's blanket statement to invite players to reach their compliance team, one that now become the main-and-only source of problem resolution [no thanks to those who encourage to make noise in as many platforms as possible, simultaneously, as it's the reason why casinos like Rollbit applies this method to lower the redundancies to address at all of the platforms].
If it is the case, then OP should only bring all the details to compliance team, they will investigate, and if he's clean, he'll get his account back. Otherwise [if they found suspicious activities], he'll eventually get yet-another blanket statement of AML/ATF as their final verdict.
That does explains it then because, a lot of users keep hanging on these statements to be a means for Rollbit to abscond from the inevitable with this blanket statement and yeah, having to use every means possible to raise awareness of certain complaints just to ensure visibility while, the complaints is actively being handled at one end could be overwhelming but, your eye opener to reasons behind these systems and approach to issue resolutions is always a needed insight and appreciated.