Kevin Hart vanished from his struggling namesake media company’s office for weeks at a time and left anxious employees to navigate layoffs, canceled meetings and mounting financial turmoil without him, according to a new report. The comedian-turned-media mogul also changed his phone number in the wake of brutal job cuts that wiped out nearly a quarter of Hartbeat’s workforce, Bloomberg News reported. News of Hart’s business struggles came as the movie star and standup comic was roasted by fellow celebs in a widely watched Netflix special on Sunday. Kevin Hart reportedly vanished from Hartbeat’s offices for weeks — and sometimes months — after reclaiming the CEO title amid mounting turmoil at the once-$650 million company.…