Not happy with the service

Good day i previously complained about Vodacom when i phone in they say that i am in arrears.I have been to Vodacom in N1 city and i experienced the same issue. I recently upgraded and this month i received a huge bill as, it is a open line although i informed the lady when i upgraded that it must not be an open line.Again the people do not listen when we speak to them then things like this happen. Now I have to wait 3 hours to say that my account is not in arrears and to make the phone number in question a top up. I can say for sure that i am not happy with this service at all.