Failed to explain details of contract

I recently bought a car netcar tracker was installed at the dealership Few days later upon having the car netstar called to confirm other details i asked them to send me contract of agreement so i can see how much wil be my monthly premium as well as what i am covered for nothing happened till now month of june they debited R306 and mind u i bought the car end of May This amount was not the agreed amount as the consulted told me my premium is R145 few days later R69 was debited on my account I tried to get hold of them stil no reach Now i am told that my account has been handed over i ha. To may R605 and month end july thy debited the R145 so how am i handed over to GL attorneys when they are the ones that failed to tell me details of the agreement and if the R306 what was it for