National Highways Authority Of India [NHAI] — Fastag is active but shows blacklisted

I have FASTAG from PayTM for my car no. UP16CA5063. I maintain sufficient balance in my Paytm walleand it shows my a Fastag
as active.
Whenever I cross any highway toll, my fastag shows blacklisted and I have to face lot of harassment.
When I complain to Paytm, they simply say it is not their problem. This problem is from NHAI.
Kindly help and resolve. My friends have informed that many of them face such issues with Paytm Fastag.
Further I got a message that I have crossed some till on 27th January 2021 while I have not gone on any such place.

Regards,
Amit Agrawal
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