TCS sends notice through IndiaLaw firm after 1.5 years of resignation

1 year ago

Joined TCS Mumbai on 4th June 2021 as consultant with joining bonus. Due to profile mismatch, overtime, verbal harassment and no response from higher management, i resigned and sent an email on 3-Aug (within probation), requesting them to relieve on 31-Aug. They were delaying and asked me to contact this and that person. Later, by 7-Aug, they blocked my laptop access. I could not work within notice period. In offer letter, appointment letter, internal policy - notice period after probation or confirmation only mentioned.
I returned company laptop. Got my salary, variable pay too.
Now after 1.5 years- they have sent me legal notice asking recovery of bonus and 2 months shortfall basic salary, within a week- else legal action. ( No calls or emails- they had my old defunct hotmail ID).meanwhile, i shifted to different city twice, but my phone number was same. Never ever they called me. They used very bad language- "you had fraudulent intentions to dupe company etc."

Please advise.