No answer when calling!!!!!!

I have tried calling the cancellations department *** for 4 days in a row, i have sat waiting for at least 20 minutes everytime!!!! I even phoned on the dot at 9 am, to still be informed that we are experiencing high call volumes???? All i want to find out is how much is it to pay up 2 of the contracts that are linked to my account for my daughters so that they can move onto their own contracts. I have phoned the branches, and even the normal call centre and chatted to a consultant online who all referred me to phone the above number. Surely there needs to be alternative options if the call center can not handle the influx of people calling in. Seems as though vodacom is NOT interested in receiving new business!!!