Flipkart — Someone is using my email as their flipkart ID

Someone is using my gmail ID as their, flipkart ID, i am getting all the updates of his purchases. i even got his phone number, and name because it looks like he raised a complaint about one of his purchases and flipkart tried to call his phone to resolve the issue, when flipkart couldn't get to him over the phone, flipkart email (to my email Id) saying Mr. Mathew, we tried to call you on +[protected] but got no answer.

So since, i had his number, i contacted him over WhatsApp, requesting him to stop using my email Id but then he blocked me on WhatsApp.

I really don't know how to stop this.