Thanks for the advice and support. My original email requesting a refund was sent just one week after the replacement arrived. This is why I'm so annoyed. It has taken them over two weeks to get to this point, and I am
still no closer to getting a refund. Part of me wonders if they are just sitting this issue out until 28 days have passed, at which point they can just hand it over to the Pioneer engineers. If so that is simply terrible customer service. Until 28 days have passed my contract is surely with PRC and not with Pioneer. What should it matter what a Pioneer engineer says, or what Pioneer advise?