Re:
It doesn't seem you are having much luck, but at least you've got your £ back. I hope you get the brakes/parts you want one day!
I'm having an issue myself at the moment with something I sold on eBay. Thankfully the buyer has been understanding. eBay have essentially lost the package (global shipping program), and over 2 months later I'm still no further forward in getting a refund as the customer service team and the gsp are not linked up internally so all the contact team can do is ask the gsp team to investigate, which they clearly aren't doing. I've spent many hours on the phone and it seems there is little I can do. It's been escalated and escalated with no action or end in sight.
What to do indeed?