Vodacom Contract Cancellation dept. is USELESS & Pathetic to deal with

i prematurely cancelled my vodacom contract in Nov/Dec 2017. vodacom gave me the amount to pay of which i did. i then emailed vodacom that it was paid. a month later my contract acc was not cancelled. i spoke to vodacom and they said they will do. unfortunately again it was not cancelled. i then dealt with Vodacom a 3rd time, and they cancelled and said nil was outstanding. this morning, 3 mths later i get an sms that this acc is overdue. this is the 2nd contract acc that i have cancelled with vodacom. on both cancellations they have made errors and my life difficult. the vodacom cancellation dept is useless. worst bunch of people to deal with. your current system for cancelling contract accs is pathethic. nothing works well. disgruntled vodacom client.