My account is still in Arrears

I am so disappointed with Vodacom i have a contract with them and it happens that i short paid them with R100 and they called me and i rectify my mistake. I have been paying vodacom an extra R200 for three months and my account is still in arreas and they also hend over my account to their legal collections without checking their facts. My credit score is a mess because of Vodacom. I called customer care centre and spoke to Portia and she did not even help me she put me on their survey without helping me and i was put through collection department where i spoke to Lebohang and she told me that she can not help me because she doesn't know how to help me and what about my account and i will never recommend Vodacom to anyone service is so bad and the staff has got no manners to treat their customers fairly