I updated my Sat nav end of last week for a Garmin 760.
It was wicked for a day then failed to switch on, so I took it back to my local store and was told "mmm yeah we have a really strict returns policy"

I said oh not to worry then as its dead and wont switch on, he (a local 15 year old with a full face of bum hair took if from me, tapped it a few times and did actually manage to get it turned back on, he handed it back with a cocky look and said "Nothing wrong with it mate"
So I turned it off and tried to turn it back on and did the same stayed off. He tried again and it switched on.

I was running late friday and didnt wish to piss any ones weekend off so I said look bud I need this over the weekend I will give you a choice, we deal with it now or if I get back from my weekend Sunday and its playing up still I will come in, but perhaps a little grumpy and perhaps slightly less easy to deal with.

So Off I plod with my existing Sat nav and to my suprise it stopped working last night.

Popped back to Halfords today and I see the lads face dropped as I walked in with a Satnav box. I get the speal all over again which got my neck up.

He calls his manager who took my sat nav, walked away with it and came back with another unboxed and says here you are all swapped, so I sneakily checked my box serial number against the unit and the cunt had the same bloody number!!!!!!!!!!!!!!

Now, this is my second unit and apparently Halfords do not refund only exchange, but based on this what are my rights, I have had 2 both gone faulty yet the fookers wont give me my cash back. Can I not argue fit for purpose or something like that.
Looking on line I can only find legal stuff for Halfords online and not the stores.

Any advice offerings from you clever lot.