Data and Airtime deleted

I recently upgraded to the Smart S plan - before I upgraded I uploaded more airtime and data. When I upgraded my data and airtime was deleted - even though I did receive a SMS from Vodacom stating that my bundle will only expire in one month. When I called Vodacom to query this I first as on hold for 20 minutes, then finally after I messages Vodacom on Facebook and then emailed another address, Rozario Engelbrecht (Your reference service S3-82Z1E-EGGFR) said that \they"were supposed to make me aware of this and that this will be queried. No one could tell me who \""they\"" were and why no one let me know that my airtime and data bundle would expire"