Vodacom quick to ask for money but can't fix their clients issues

Past few months Vodacom has not sorted my query of my bill which was high. Vodacom Signet Terrace manager Irfan has been working on my account but his efforts are invain... I tell them at accounts won't pay till sort out bill they block my line. But very quick when need money paid in. I am disgusted by their behaviour and will add a msg daily till they fix it or permanently cancel both my lines and give me a new contract of be...