Snooper help

Spoke to them today , asked them if they could actually tell me what was wrong with the sat nav , said the repair team were still looking at it ,No you’ve sent it back I’ve got it , but you’ve not emailed me , put a letter in box what’s actually wrong with it
Said I’ll see , said they don’t stock part as it’s a old model , haven’t had parts for these s8000 for 2 years , but they’do me a new one for £299
Explained I’ve already got a new one I was hoping to mend this one for a new driver , asked what had actually gone on mine , didn’t know but haven’t got parts
I’m not convinced they’ve even looked at it , think there just trying to get you to buy a new one , poor really , good bit of kit but after sales let’s it down imoho