Power Hour Bundles not effective

<p>Tonight I bought a power hour bundle at 20h24 and made a phone call to another Vodacom number for 25 minutes. R7 was deducted from my airtime, and the balance went from R584.62 to R577.62. After finishing the 25 minute call though, my balance was only R542.07, thus I lost R35.55 although I had "free minutes" in order to cover my Vodacom to Vodacom call. I would appreciate if you could kindly rectify this problem as soon as possible.</p>