Yes, their USDOT was revoked on Oct 7, 2019. It looks like their insurance was cancelled and not renewed.A little bird whispered in my ear that RBT Limited at 285 Main St N in Acton had shut down. I went to the location on Friday and found that they left 2 weeks ago and have not been seen since. That explains why my emails went unanswered and all voicemails were full. So much for getting payment for my outstanding invoice.