Struggling to Get Relieving Letter – Need Help - Analyst Merit Software Solutions Employee Review

I worked at Technosoft (DLF Porur) and completed my tenure, but I never received my relieving letter. I’ve made multiple attempts to reach HR through email and in-person visits, but was not allowed entry. I also couldn’t find any HR contacts on LinkedIn, and I’m unable to proceed with joining my next company without it. If any current or former employee could help with a valid HR contact or guide me, I’d be very grateful. Thanks in advance!