i've been naming and shaming them for years now!
i did argue for ages, they just said that i added bits to it, like fit a 2 stage boost switch & fan override & new thermostat
just that up bumped the price up £400!!!
i just stuck it on my credit card!
wost thing is that was 3 years ago and i'm still payin my credit card, so its probably cost me bout £2000 now