Cognizant Technology Solutions — delay joining letter

I have received offer letter from cognizant on 8 july, 2019.
As per instruction, i've submited all required documents on onecognizant portal and complete all pre-joining formalities. More than 2 month passed but still i didn't receive any mail about further information regarding date of joining.
Could you please, tell me about joining date in cts.
Thanking you