Netstar is the playing me for a fool

2 years ago i sold my car to the dealership and got a upgraded car. I told Netstar about it and ask for a tracker on my new car. For the last 2 years they have billed me for 2 cars. I tried to get hold of them last week and they sent me from one department to another and then the phone just go dead ( no one on the other side ). So i tried agan and eventually get to the right deoartment and then i get told they will look at my account and come back to me in the next 24 hours. This is a new week and no one came back to me. I tried again this morning and after going through the whole process again ( press 1 or press 2 or hold for someone ) eventually get to the right department and they have more department in that department for them just to tell me i must send an email. If they couldn't even return my call how are they gonna return my email. They owe my money now they gonna play musical chairs with me.

My cars registration: CA 70075 I also get billed for CA 70075AA (Not my car)