Window tinting

I had two bad experiences with this business. The first was last year when I was quoted $300.00 to tint the windows on my Toyota Land Cruiser and ended up being charged $330.00. I let that one slide because it was a big truck and went back to them to tint my new Camaro two weeks ago. The job came out horrible. It looks like they never cleaned the windows before applying the tint...there is dirt and bubbles trapped underneath. Not just a speck here and there but the entire freaking thing!!! I went back and asked them to fix the problem and they refused. They gave me some run around and said they cant do it because it wont look good and will ruin the car. This place is a rip off and I'm never going there ever again. I'm going to have this horrible tint job fixed by someone who actually knows what they are doing. BEWARE!!!