i cant pay for something that is forced on me

i purchased a datsun go from my dealership, when purchasing the vechile i was told there was a tracker inside my vechile . i asked the dealership can i cancel it they said yes if i want to. i asked the dealership will i pay any penalties. he replyed and said No as long as i do it with in the first three months ,so when i phoned these people to cancel my policy they said no i cant cancel it by phoning off the phone i must send a email to the cancellation stating why i want to cancel my policy which i did. so the response i got from them is i must pay a settlement fee of 699 which i think its ******** .cause this tracker was forced onto me so i dont feel or should i say i wont pay these people a cent cause no one can pay for something they dont want and has no need i went to my dealership today and asked them to phone them cause i cant get a hold of these people ,they phoned tracker but the people said no they in a meeting they will phone and contact me which they didn\t i owe them nothing so they must stop harrassing me and they must come take they ****en tracker out my ****en vechile"