Avoid store

Had ordered a latte mixer from them. Product delivered was defective. Wrote a mail to them about same. Reply came after 10 days asking me to get in touch with seller. Seller has not yet responded. I am expected to go to the authorised repair centre to get this fixed. For a product worth 200 I burn much more in fuel if I do this.
Also they issued 100 off coupons which I used to order a product successfully. Next day order was cancelled with no reason but coupon was not refunded. When I wrote to them was informed that it was a non refundable coupon. Order was cancelled by them so coupon should be refunded as well.