Online order fraud- delivery charges

They have an Instagram account named kritika_kids_collection_18 that sells kids clothes. We ordered dress from them and then when we paid first 550 ruppes they said we don't send free shipping in your area . Please pay 999.1 ruppes which they will refund once the order is confirmed,when we send that they said we have done wrong transaction,we need to send 999.01 rupees then when the transaction was done they said the order is still not confirmed please send 1998.11 ruppes now within 13 minutes . Then we realised that it's a scam.