vauxhall tigra 1.4 sport 2005?

i bought a tigra 3 months ago thought i had got a really good deal under drivers side floor footwell completly soaked, i have paid vauxhall to repair they have stripped the pedal box out and resealed the pedal box twice it has not worked i am so flustrated as this car is now working out to be a really expensive car, they now want to take the dashboard out big job again, please can someone help or advise with the same problem, no recalls on the tigras for leaks!!!!!