Garmin Watch bought on Blue Dot sale

I bought a Garmin watch on last year"s Blue Dot sale. Within 10 months the watch was devected snd I return it and ask for replacement. After one month someone phoned me and ask if I can be given credit. I said that the credit is insufficient to replace the watch. They refunded me anyway. They refuse to replace the item under warranty. Due to the difference in price. Please be careful before you buy anything on a Blue Dot sale.