HDFC Bank — False training letter

Sir
Third-party has call up me and the asked pay the money for the appointment and to get the job
We have paid them RS-3750 and leter on we found that the letter which they sent me is not correct.
Sir plz help me to solve this problem
They ask me to pay on this account number
A.c holder name: Satish dhiman
A.c number : [protected]
I.f.s.c code : KKBK0000218
There number is Amit Kumar-[protected]
Another is from shine -[protected]
I have the payment record also . Sir
Plz help me and there email id is
[protected]@gmail.com