State Inspection

I have been to several auto repair shops in Houston and this one is absolutely the worst of them, by far. So I wanted to do a simple state inspection on my car, which runs very well without any noise or problems. Their behavior was so rude, unprofessional, and dishonest and they wasted my time by making me visit four times without finishing a simple inspection although they charged me for that. First time I went there, "their machine was down" so I came back the day after. After several hours of waiting, the rude staff told me that my car needs a CV axle replacement that costs $400 and without that replacement, they won't pass the inspection. (Note: CV axle is not even part of the state inspection!) But regardless of that they charged me for the inspection service and they gave me a 10-day grace period to fix this axle and come back to finish the inspection for free. So I replaced the axle in another shop for $250!! and came back the next week to finish the inspection for free as he promised me. But guess what? "The machine was down" again so they asked me to come back the day after. Finally, I took my car for the forth time and he told me "their machine is still down" and I need to take my car to another shop in order to catch the registration deadline. But I have already paid them for the inspection. When I complained, they just denied the whole story and whatever he already promised me to do. VERY RUDE! I do not recommend this shabby shop to anyone. I wish I could rate them zero stars.