Faulty Vodacom Systems

Today at I bought R100 airtime. I then had a balance of R122. I then bought 100M data @ R29. That would have left me with a balance of R83. I then used whatsapp for about 2-3 minutes when a message appear that I have no more data. On checking I find that I only have R24 airtime left instead of R83. I then call vodacom customer care and within a minute my R24 airtime is also up. Vodacom there is a fault on your side, please give me back my data and airtime lost