Wipro — Not able to get Employment Verification Letter (EVL)

I was part of Wipro (Employee ID 842244) from 28.7.14 to 6.5.19 and moved to New Jersey, United States last year. Right now, I’m in the process of applying for my Green Card(GC) application for which the organization needs employment verification letters (EVL) from all my previous employers.

I tried to contact the relieving team and HR but didn’t get any response. Finally after chasing the team I got response from relieving team but they are not agreeing to issue the EVL in the required format. I have tried to explain them multiple times that the format needs to be consistence with the immigration authorities requirements but not getting any support. Is there any way to get out of this. If I don’t able to find a way then it can impact my stay and future plans in the US.