air bag/vag com help

hello there

have a 1.4 fabia comfort 2000 (w),bought 4 months ago.from dealer 50 miles away.has been back three times,everything i have asked he has done.two of the three times included airbag light.he connects to code reader,and i presume does a reset.last's about two or three weeks and airbag light comes back on.i am getting a bit peed off now.its on and has been for a couple of weeks.he has said pop it in and he will reset it again.but 100 mile round trip,just to turn out a light is getting beyond a joke.does anyone in the stansted essex area have a vag/com who could do a fault reading for me,and maybe get to the root of the problem,

cheers dave