vehicle registration failure and recurring undiagnosed electrical repair

Full record text

I purchased a car from Tasca. A few months later I received a renewal notice from the registry. Listed on the form was my previous vehicle. I contacted the registry who said they had no other vehicle listed for me. I contacted Tasca to find my new vehicle had never been registered, and I had been driving around in an unregistered vehicle for two months! Six months later my car started to experience a short in the locking mechanism. It only happened when it rained (which indicated to me that it was probably electrical). I made an appointment with Tasca service, noting to that person, and separately to the service manager, of the problem occurring when it rained. After diagnoses was told it was a "smart box" that controls most of the electronic components in my car. I had it replaced at over $600. About one week after the smart box was installed, the problem started again the first time it rained. I made another appointment. I re-emphasized that it was happening ONLY when it rained, and that it may be a short in the system. They worked on the vehicle for 3 days and said the problem had been resolved. Three days later when it rained the problem started again. I called to make another appointment and was told there were no openings for over ten days. (I was worried about getting locked out of my vehicle) After two more days at Tasca I was told that the key access control on the exterior driver side door was getting wet when it rained. They fixed it. To make matters more frustrating, Tasca had a customer service rep call me to thank me for bringing my car in to Tasca, and inquire if I was satisfied with the work that had been done. This happened twice while my car had been held over because the repair wasn't diagnosed properly and/or completed. If the customer service rep had checked she would have known that my car was still there. And with further investigation would have understood that my car was in multiple times for the same issue. It seems like one area of their customer service does not know what the other area's are doing. All I received through this was an "I'm sorry" written on a business card from the salesman when I finally received my registration. It would have been nice to at least have had my car rushed in after the third incident with the short in the system, instead of waiting over 10 days. To acknowledge that maybe I didn't need a smart box, and an offer to cover half of that would have been a gesture of good service. Or at least a free oil change, which last time cost me $300. Their motto is "you will be satisfied". I sent them an email on my experiences. They never responded. A good initial sales experience, but one star for bad customer service.