IM FED UP WITH VODACOM

my husband recently pushed the wrong button when trying to load data so at the end of the month he charged an extra R150 odd onto his contract we called VODACOM and spoke to customer services who then informed us she will change it for him so he wont be charged again this month only to find they took it off again this month. what dont people understand about there jobs, why do they get paid to do so called work but they dont do it HAve had enough of this now. VODACOM you best sort this problem out i want my MONEY back in my husband account or we take this further. this was your Peoples responsibility and we were promised it would be fine come the end of this month now he must pay over R400 again when it supposed to be R279 a month. i want our money back and this resolved.