I’ve been told to apply to a civil and administrative tribunal over my faulty dishwasher. What does it involve?

It doesn’t necessarily matter that the dishwasher doesn’t have an identifiable fault. What matters is that it doesn’t do the thing you were led to believe it does. Photograph: Tom Kelley Archive/Getty Images

A little over two years ago, I bought a new dishwasher. From the beginning, it did not function properly. Multiple technicians were called out under warranty, who said the dishwasher does not have a fault and is functioning as it should. I accept that there is no “fault” that could be fixed, but the fact is the dishwasher does not clean dishes – there are numerous reviews of this model online complaining of the same issue.

The retailer refused to accept a return for a refund or replacement, and because I bought it for my tenant, I had to replace it at my own cost. The whole process has been very frustrating, and I now have a useless dishwasher stored in my home, which remains under the manufacturer’s warranty.