please CANCEL the R69 you added - I don't want that extra service!!!!!

I have been with netstar for years - paying for just the tracking services. Now they have added valued services offerings and they are adding it to your account. My bill includes R69 I didn't opt in on. I tried to cancel, then you get transferred from one department to another. The final department said they cannot pick up any value adds. Then they have the audacity to threaten that they will list me to the credit bureau. For a service I am up-to-date on but you decided to add stuff??? Account number: ***7 CANCEL THE R69!!!!!