HDB Financial Services — Resignation letter

Dear sir

I am Jitender singh(J13198). I worked in Noida corporate PL team & my SM is Abhishek Sharma (A25122). I was resigned 10th july 2021. I didn't received any mail acceptance confirmation because I have selected in another bank and HR ask me again and again joining date otherwise my offer letter will reject then who will take responsibility. So please confirm me resignation acceptance mail.
Thank you
JITENDER SINGH