Vodacom upgrade department

Good day I called the upgrade department to find out when I was due for a upgrade the guy told me 2 of my contract can upgrade now and so I did the upgrade... He then told me end off may I'm still gonna pay for the two old contracts but end of June I'm paying only the 2 new contracts now the billing me for 4 phones the 2 old ones and then the 2 new ones.... I was miss informed during the upgrade time.... I logged a call 10 june then a lady phoned me back and said the problem was on vodacom site they will correct the account but since then I only logging calls with no outcome... If they told me I would pay for 4 phone I would not have done the upgrade PLEASE HELP CAUSE VODACOM CUSTOMER CARE DON'T WANNA HELP