Cognizant — offer letter not released 2 months

Hello,

I had interview with cognizant on 7th april 2018 pune, cleared all rounds had hr discussion, they told me they will hear from us within 2 week but i had no communication with them, just received one mail saying your interview process is under review, it been almost 1.5 months now, still no communication.
I tried reaching to hr, they just telling me to wait until all the approvals are in place.