Cognizant Technology Solutions — regarding pf transfer issue

Address: TCS, Hiranandani Powai, Mumbai City, Maharashtra, 400076

I have joined tcs on 23 may, 2018. It has been more than a year.
I have raised a pf transfer request online thrice from epfo portal and have also sent a hard copy of form 13 generated on epfo portal to previous establishment (Ie. Cts, chennai office), but everytime it is rejected by field office (After accepted by employer). I am unable to understand the reason.