Txt messages and calls

I recieved a text saying I won 200, I text stop. A new york number persistently called my phone. I finally anwsered. He said I won a 120 dollar gas voucher card, I did not have to pay anything, he was not a telemarketer. Then he asked me for 3.95 shipping and handling. I said no way, not giving you any of my information. He told me he already had all my bank information. I told him he was a liar, I would buy my own gas, I did not want it. I hung up on him. He called me back to back to back, I picked up, I said Okay I am an off duty Federal investigator (not true but he was lying) I will find your location and personally come to you by trace. CLICK CLICK, no more calls If you call the number back the mailbox is full