Indian Postal Service — Pay money for GST after will get salary

I got an email from nsh.postal.[protected]@gmail.com. they are offering job. I accepted and I worked and sent it to his email. They sent quality checking report and asked money to pay for GST Rs. 8539/- So I paid that amount. I got an email from helpdeskgst.govt.[protected]@gmail.com. You paid only one GST pay Rs. 8539/- again. then only you will get reference number for both SGST/UGST. Then I paid again Rs. 8539/- They sent Reference Number. Next they asked your account type is savings, so I couldnt transfer that amount, so you have to pay Rs. 17, 230/- this amount and GST amounts ( 8539 +8539) with your salary will get immediately. They are asking money. They cheated. They are using Indian Postal service logo and Government logo. Please check these details. I will upload all. here. Kindly check and update my amount.

His contact number - [protected]
Bank Name: Fino Payment Bank
A/C Holder Name: Indian Postal Service
A/C number: [protected]
IFSC code: FINO0001001