Myntra.com — someone using my email id to order product from myntra website

Address: Sonia Vihar, Delhi, 110094

Hi, i got the mail your order has been confirmed even id dont use the myntra !! he ordered 3 time about 5-6 thousand rupee first order he cancel but again 2 times in a row he again order, how someone can order by using someone email id the security privacy in myntra too poor i ask help about myntra for this via twitter they said kindly content cyber cell what!!! even i provide all the details of culprit to take action they said contact cyber cell wow!!!