Boat — Negligence in solving the problem of refund of parepayment of product even though order is cancelled

I had ordered boat 2airdopes. After doing first order they cancelled the order, then I ordered the product 2nd time they said that this product is not available for cash on delivery, it's prepayment, I was also done the prepayment of 2598, after 3days I got a mail that my order is cancelled since then after 7 days also they even not done the refund, and also they don't even try to solve the problem of issue of refund after doing a call to customer care