Termination issue

Hi team i worked at mnc last four months but suddently they fired me for some reasons i dont' know what happen and i totally blinded after that incident i asked my manager he not responding my calls and the date they fired me on may 11 2017, but still i won't get any termination letter with the company side Issue : I was spoke my head her name is divya it's totally education so i asked about college details apart from that bus details and fare details Both had conversation with our language during interaction i request her for details but she denied thrice so leave the topic but my bad circumstances i got call from another employee id that call have divya again and she ask them to speak with me so both discussed about student bus fare details she ask twice and she scouted on call so i inform her to disconnect call... But i didn't done anything wrong so i asked my manager to check my record like call and email but my manager hav'nt checked i send mail to manager regarding this issue but no response from them Team no tell me what can i do because i am helpless the manner manager behaved that was not fair