Using Airtime instead of Data

This morning I first checked my Data Balance and once I was sure that I had enough data I downloaded two items from Google Play. After the download was finished I checked my Data Balance again to see how much was left. To my shock I found that my data had not been used at all and that Vodacom has used more that R200 of my Airtime instead. I have been calling 082 111 for hours no and get no answer. Since my husband passed away I am the only breadwinner and I cannot afford to lose this amount of airtime as I cannot afford to buy more to replace it because Vodacom's system is faulty. It would be great if Vodacom could fix this problem and reload my airtime and take the right amount of my data. The only reason I am reporting this here is because I cannot get through to 082 111 or the online chat for more than 7 hours now.