Cognizant Technology Solutions — Failed rolling offer letter

Address: Hyderabad

Hi Team,
I have attended interview for CTS and successfully cleared the technical rounds.
I have got an email on april 9th, 2021 from CTS hr that i have cleared technical round and to submit documents.
Next day i got call from cts HR and they gonna roll the offer letter.
Till today I haven’t got any offer letter and no response from HR for my emails on status of rolling offer letter