it depends. i think if i got a refund they'd try and get away without it. But as there is a shortfall between my car and other fr's they'll have to foot the difference. Seat uk are involved and i would assume that they'll make sure that i'm compensated for all the bad service, lies, etc.
Hmmmm this might be a steep learning curve for you my freind , when you say SEAT uk do you mean SEAT customer care?. if so you will get nothing from them and their goodwill gestures will be free services not money.
The dealership you are dealing with will refund you your cash back , they will not have to make up any shortfull on any car , if there is another car thats more expensive they might offer you a discount to keep your custom but i guarantee you it will mean you spend more cash.
They will firstly try to get you into another car before giving you your money back , and you will recieve an apology and that will be it.
You have 2 other options ,
1 tell seat what you want , if you really want to keep the car i would ask seat for a brand new engine to be fitted and 2 years free servicing and your seat warranty extended.
2 , get them to find you a replacement vehicle from the seat approved used vehicle scheme.
if all else fails you will get a full refund and just put it down to a bad experience.