Frustrated client!

I am disgusted at the service received from Cartrack regarding my chip being faulty and picking up my vehicle in different locations than where it actually is. I've contacted them everyday since the 23.10 I've been advised they will get someone to call me back from the repairs team. No call back received! I callback and keep getting transferred from one department to the next. I get send t and c's however to confirm if anything happens to the vehicle where the fitment was faulty and not changed within 3 days they won't be responsible.! Really? I've made every attempt to call and get this ****** issue resolved untill today! I've requested a manager, I get told they're busy and again no call back! I call in today explain my frustration the lady says it's booked for a repair -im shocked as no one called or told me when or how or where I ask those questions and she says she doesn't know! Really ? ? So how do u book a repair and not inform the client so she says the repairs department is closed -understandable however I ask if she can finally get someone to actually call me back to which she responds she can't BTW I was still talking and she cuts the call?? What pathetic service are they providing! It's as simple as call me back or transfer me to the correct person and they can't even do that! I am highly considering cancelling this contract. This is a complete breach of contract from their end!