THEY ARE TAKING MY AIRTIME, AND BLAMING MY PHONE!?

Yesterday, I recharged with R55 airtime. A R12 advance i took was deducted. I immediately attempted to transfer the rest into a data bundle, but it showed that I had no airtime. Thereafter whenever I dial *111#, it says something about profile lookup unsuccessful. I struggled with the phone till this morning. I took another airtime advance of R12, and as soon as I received it, my airtime was gone again. I phoned vodacom, and they blamed my phone stating that it is background data. I have this phone for almost 2 years, I know what background data is, and I have restricted it since the start!! I asked someone to load a data bundle on my phone, and guess what, it is still happily in place, not depleted in a split second like my airtime. I want my money back. Vodacom is already the most expensive supplier, is it necessary to take even more of my money and just pull up your shoulders when the issue is clearly on your side??!!