I got fraud from an online store

First of all he told me to do ₹100 online to confirm the order then today he told me to do ₹500 online to deliver the product in 40-50 minutes then he told me to give 1390 rupees which will be refunded after 2 mins then he told me your ₹20 is pending and as we have merchant account and to show to the upper authority the amount should be ₹720 so and ₹20 will be deducted and 1390+700 rupees will be refunded to your account and I denied that I don't have that much account balance so I couldn't receive the parcel and please refund me he told me refund Cannot happen because you need to clear the dues or else we can not refund you first of all send ₹720 then we'll refund you 1390+700 rupees and I denied