you need to contact the MA equivelt of CT's better business buearu.
Take pictures of the defects and have them on hand and present them to the dealer when you return the car. Be sure to tell then that this is the 9th time the car has been to their facitity for service and for the quality you received you might as well have done it yourself with a brush.
Maybe even bring up that you will be bringing your case to the attention of an attorney if this issue is not resolved quicly in a manner that is acceptable to you and resembles the finish quality of a new viehicle.
usually just the word "attorney" strikes the fear into dealers and they will treat you like a king afterwards to prevent a blood thirsty lawyer from ravaging their operation.
