Passing used products off as new

Purchased a brand new dishwasher. Arrived looking like a refurbished product. With Door didn't fit and there were water stains so clearly been used. Logged a replacement almost immediately after delivery. So far all well. They collected and on my after informed me they need to assess before replacing the product. It could take weeks and there is no guarantee I'll get a new one. I am disgusted by this. I have logged a few replacements in the past and it has always been instant.