Telkom Consultant and their lies...

I have a router,have been using it for the past year.The Consultant that sold me that router told me its Capped,I had no issues,until this past month my bill turns out to be double the amount,when I called there customer care,they could not answer me properly,I asked for their supervisor to call me back,but they seemed to have forgotten.The consultant then says my router is uncapped.So these people,they speak alot of lies...I still want someone to get back to me as this is unacceptable...This is not how a customer supposed to be treated.