Vodacom *******!!!

I have contacted Vodacom now for 3 months running, my cellphone contract ended in November and getting the damn unwanted contract cancelled worse than going to the Dentist... and ten times more painful I have called them 7 times get told I will get an sms and email which never arrives and now I am paying R400 for a contract that ended which they have failed to cancel... Very unprofessional and an absolute crying shame...when any other contract ends you need to get permission before you continue charging for an it... Feels like they are *****ing my hard earned money!!!!!!