mate if anything did go wrong a month later the first port of call would be to go back to the tuner. If it still wasnt resolved then make it public. The main issue with Turbofit is that they were at best negligent and at worst dangerous. My tuning knowledge peaks at BPU/Suspension/Brakes and thats as far as I have gone with all my cars (300zx/GT4/Soarer/Supra) I wouldnt go any further because i wouldnt know if a good job has been done or not. However, if I did, I would go to the tuner with the fastest car in that field.
I went to Turbofit because i live in milton keynes and they were literally on my doorstep. Things that happened on my car were pretty minor like they damaged my power steering valve and claimed it was 'worn' and chaged my spark plugs but didnt note my cambelt was shot and needed replacing. However, how do you deal with something like that? NOT TO GIVE THEM ANY MORE BUSINESS. It seems like problems had happened quite a few times with other people that have used them so its a lesson learnt to not pick people on your doorstep because they may not be the best