Hi,
There is no excuse for a bad job, our work ends up looking like the glass, we simply do not hand the vehicle back unless it is perfect.
What most tinters suffer with is called contamination, this is normally when small particles from the vehicle its self (felt edges from the rubbers) or crap in the water etc. get inbetween the film and the glass. Cheaper films also don't work as well and most tinters cut the corner on cheap films to
help reduce the price. This is often backed by companies who go mobile and you cannot get a clean install if you are a mobile tinter. So in a nut shell you have evry right to ask for your money back. They may wish to remove the films if they give money back but if its a bad job they you loose nothing bar a bit of your time and bit of hassel.
At least then you can hunt down that perfect company to provide the job you were looking for.
The best tint companies will stand fast on insisting that you go to them.