Genpact — Onboarded but didn't join

Address:

New Delhi, Delhi, 110060

Please help? I have given the interview at genpat company and got selected.i onboarded but didn't go on my first day and didn't work but at the end of the month they given me salary in my account. I didn't sign any bond with them.A man from company came to my home and told that salary aacidently given to you do not touch that money. the most important thing that freaking me out is that they send me warning letter which says i worked for 28 days.absolutly i didn't even step in that office.i think they will try to charge me training fees that's y they r playing dirty tactics.