Source Automation Publicator review: Payment not received and they asked me to pay gst charges of 350 rs 1

I got a mail from source automation publicator saying that you need to complete the file into one word document for that you will get 3500 rs if your work is verified than the next day I sent a mail to them that I have completed my work and attached the document then they replied that go to telegram and tell that my work is done and get paid for that work after that in telegram I got a reply that your work is verified and you will get paid 3500 rs for that you need to pay gst of 350 rs it's a government rule they said and I paid it but I didn't receive my payment of 3500 rs please help me