No answer

I need to contact the sales department to change my package I have. After trying to get reach of anyone for a month. Phoned 10210 everyday, and was on hold for the maximum of 2 hours. I tried using the online chat assistance to only be left in the queue the whole day. I tried phone Klerksdorp branch only to receive the message that their mailbox is full every time. I Submitted my umber on the call me back application. Still no response or call received I need to urgently change my package after trying for a whole month!