I am a client with c...

I am a client with cartrack since 2008,and on the05 may 2023 i called them so that they must come remove the device from the car i want to sell so that they can install it in the new car i'm buying,and since then i called them 4 times,still they didn't come out,and worse part they tell me that they will charge me R600 for the new device if they can't get the device from the old car,I'm really not happy