Advice on a job

So recently like last Thursday I went into a open interview & instantly got the job. The interviewer sent me an offer letter did a background check everything cleared but no one has reached back to me for an orientation date. I’ve called Monday to see where things are at & everyone’s suggestion was to be patient. Here we are it’s Thursday & no one has called me back. I’ve been seeing a lot of bad reviews on the company and how slow they are but someone people are saying they’ve gotten to pretty quickly with the hiring process, what would you do? Keep calling or continue to wait?