Disgusting service

Vodacom does not offer a service but rather a disservice. I have been trying to cancel my Vodacom account. I am unemployed and emigrating and I have been treated dreadfullly. Ntombu from the cancellations department proceeded to shout at me and insist that I upgraded my contract which I have not done in four years and have no email or sms notification of any such upgrade, then proceeded to tell me I will need to pay in R9500.00 in order to cancel. All I want to do is cancel my contract HOW HARD IS THAT TO DO? I am honestly disgusted with this company that I have been loyal to for the past 10 years.