Teleperformance — Complaint for Hr and TL

I have resign form teleformance on 14 of. July and completed ma resign period also but the company have terminated me by saying that in resign I have chosen non performance category because of that the company is terminating me.
If company is terminating me than why my Hr and tl told me to serve resign period.
I want perfect reason for terminating me form my company or else I will go tho labour court.
Name kumar kushwaha
Emp id. [protected]