Ascent Robotics Full Stack Developer interview questions

Got approached on LinkedIn. Next step was Interviews with HR, CTO and senior team members. There were discussions about software architecture and general approach to several problem solving scenarios. I got an offer, I accepted and notified my current company that I'll be leaving. Next day, I received a call and I was lied to that their budget wasn't approved, so they have to rescind their offer. LinkedIn showed that they hired someone else for the position.