COMPLAINT - AIRTIME LOSS!

Firstly - my airtime keeps disappearing & no reason as to where it disappears to is given by Vodacom.This is the third time this is happening.First occasion they refunded me with data that had an expiration date-if i had my airtime I would use it as and when needed.Second time I didn't bother complaining & now its happening again.Reported the incident 5 March to Vodacom Tokai where we were not assisted.Went to Vodacom Canal Walk & they escalated my complaint on their system-no reply from Vodacom to this date.Went to Vodacom Cavendish 12 March where they confirmed the airtime for March was not in fact loaded.They escalated it & requested my airtime be loaded.No response from Vodacom yet again to this date.My boyfriend called in today 16 March to ask about the airtime and the consultant from the call centre said it was loaded but was depleted by internet usage.No reports on what internet application is provided by Vodacom because as I assume they actually have no idea what's going on.Different stories from their in store consultants & call centre agents.Ubelievable.Now to wait another two weeks before I need to make contact with them.Guarentee they wont respond this complaint either.