National Highways Authority Of India [NHAI] — Fastag purchase idfc

Website:

onlinefastag.store/index.php

I had purchased Fastag online on 8 April 2021 by paying Rs.1199 from the following site:
https://onlinefastag.store/index.php

I received the courier with details:
FASTAG N0:[protected]
COURIER N0:- EM[protected]IN

But the Fastag balance credited was only Rs.100
Out of Rs.1200 paid, IDFC Bank has not given proper explanation on the split up.

Further IDFC didn't mention anything regarding the minimum balance to be maintained due to which I had to pay fines at teh toll gates even after purchasing the Fastag.

Please help in getting the refund amount from the bank.