Cancelation

I am not happy with service i am currently receiving frlm Netstar. I called to cancel was told about 3 year contract which i disagreed with. I requested a recording since the 1st of June to date no feedback. I made a follow-up today spoke to Courtney who was helpful but couldnt get hold of Barry who is the manager that must give me feedback. I was told he will call back still nothing. I have 5 vehicles with Netstar but its a hustle to remove one that i sold. Can i get assistance please