Hi Rachel, this issue is being resolved. The parts arrived and you are scheduled for repair. Thanks.
Repair is a tough job, you diagnose based on best guess and then repair those items to see if it works. Talking to the owner seems like a more concrete step. Express your concerns with more specificity about what the problem was and what was done each time. Listen actively and try to come to resolution. If they make you unhappy on the fix, you won't buy from them, which is their primary business. Seems this is likely more a misunderstanding.
Call the manager they are really nice people there
Call and request to speak to the owner.
Exactly what Brian said
Thanks! Your answer is awaiting moderation.