Flipkart — Someone hacked my Flipkart account and used Flipkart pay later

Hi, 2 days back my Flipkart account is deactivated and one message came on my WhatsApp that my account is deactivated. And I am login to my account it is shown that account is inactive. After a day one mail came from Flipkart that I ordered apple airpods and they told me to pay 2k every month as emi. But i didn't ordered any thing. Next day afternoon call came from Flipkart and they told me that conformation call that you ordered apple airpods and I said to them that my account is hacked by someone don't delivery any products even though they delivered to them how is it possible.. and now they are asking me to pay that amount. I called to customer care and told what is done.they are telling me that wait for a period of time out higher authorities will handle but no reply from them. so how can I pay that much of amount without buying any thing. Why Flipkart is doing like this. Pls help me