Prepaid voucher not charging

I purchased a R55 prepaid voucher at the end of my till slip from Pick n Pay which went straight into my pocket but when I tried to recharge my phone with the voucher on returning home, the voice recording said that the service was not available at this time. Trying a second time and the recording said that the voucher had been used.<br> <br> My phone remains uncharged and it is impossible that anyone else could have used the voucher. After waiting 15 minutes on the phone to speak to a consultant, I gave up and posted here.