Appalling service and refusal to assist!!!!

I’m so frustrated with cartrack! I paid an annual premium for one of my cars. I asked if I can change that so I pay 6 months on the 1 car and 6 months on the other. Instead of paying for just the one car. The rude consultant was sighing and making all sorts of snide remarks. She said they would let me know. Just like that, I asked whether I should hold or call back. She said they’d call me whenever. I have 2 vehicles. The fact that because an invoice was raised they can’t split my payment makes no sense whatsoever. I then asked for a refund since they can’t split my payment so I can’t pay monthly and miss *********** had no answers. This isn’t a difficult thing to do. I wanted to cancel my contract last year but decided against it. I’m starting to regret my decision. So frustrated and I feel like no one is willing to assist!