Bussan Auto Finance India [BAF] — NOC not received and not reachable

Hi I brought a Yamaha Fascino in 2018 with 3 years EMI option with Bushan finance and I cleared all my Dues. They have not issued the NOC and now the name of the company is changed to fexprime and Im not able to reach the customer care

any time we call the customer care, it keeps us on hold for 2 minutes and gives a message someone will call in 24 hours but I'm not receiving any call

I need my NOC letter to clear the hypothecation. Kidly help

Vehicle number : TN12W9164