1) record his threats
2) don't bow down to blackmail tactics
3) return advance taken from employer
4) submit your resignation letter and serve one month notice period
5) you are not bound to serve any further notice period as no appointment letter was issued
6) in case any false FIR is filed you have to contest the case. Your career is not over
7) don't complain to income tax department now
8) it would further antagonise your employer