BAD BAD SERVICE AT NETSTAR

I bought a car end of December 2021 and my dealership arranged for a netstar tracker to be installed and i was advised by the dealership that i am on a three year contract with netstar and my monthly subcription will be R109.Last month i get a call from netstar telling me i owe R1750 and when i asked what its for i was told its an advance payment for 11 months.Told them thats not what i agreed on with my dealership bcoz they did everything on behalf.Nestar said i must forward proof from the dealership that im on a 3 yr contract and only R109 is applicable each month.Same time i phoned my dealership ,got the proof emailed it to them.phoned them and they kep transferring me to different people and i got help.sent a remjnder and received no response.called again and i was told once they get my email it would be sorted out.Ive given up phoning bcoz no1 seems to be able to help.I have just been debited R1750 for skmething i did not sign up for even after i sent proof to them its like i am a fool j cannot read fine print.I am very causious when it comes to money k have to pay i ask questions and only agree to something j can afford to pay.Why on earth would i opt for tracker that cost R1750.I understand its once off but it doesnt make any sense to me.I need them to refund my money and come and remove they device frkm my car..Ive never been so cross in my life.