Power hour bundles- Day light *******

Last night at 19:48 I purchased the R7 power hour bundle and received confirmation thereof and my new balance was also indicated. I then made a call and around 20.15 my call was ended. I tried to redial and I got a voice prompt that I am out of airtime and I must recharge before attempting further calls. I then received an sms at 20.21 saying \only one promo can be purchased per day and that I have already purchased a power hour promo". So my power hour was never activated in the first place"