Netstar and Nimble are taking me for a ride

I had a financial crash and couldn't pay my tracker account for about 3 months of which I made netstar aware of, So I was handed over to Nimble who explained to me that was handed over to them for collections which I agreed to, but asked if my tracking device will still be active or not and they said it'll remain active as long I honor our agreement. Its been almost a year and their device is inactive but they still deducting. Made netstar aware I was told they'll be contact with me but nothing.