Dp2p dispute

My story goes like this, there is this guy called chadwick Kawundura, he recently advertised information about selling $11 dp2p so he needed cash so l then contacted him because l needed that dp2p fund he was selling and he then created an ad on deriv peer to peer so l clicked on that ad and l paid him, after l did the payment, he refused to release the fund and he started to say you paid the wrong person in which he was the one who gave me that number to send me the money, please please can someone help me with this one, am hurt

Thank you in advance to those who will help my email address is phathisanimkwebu16@gmail.com and my WhatsApp number is +263773972863