Worst experiences at Vodacom

I was using vodacome from 2010 and for the longest time trough my mom. Last year i was paying my contracts religiously ... Then i think around august the debit order stopped ... I asked my bank what happened they said it was not them nor me ... I was quiet .. I thought they were going to take double the next month ... Next month nothing happened... I called and was transfered to another person's in that department... I placed on hold for the longest time... After September my simcard started giving problems ... Buh it ended up working i was not receiving my airtimes minutes and data ... And the in dec my sim card stopped and my number doesnt exist anymore... When i got the chance to go to vodacom i was told i owe R9000 and said okay ... When i went back to check and i was told owe R21 000 o asked for what i was not told why ... I so disappointed with vodacom its incompitant workers and *****ulant tendencies