Data bundle didn't go through but was told it did

If I load R29 or less of airtime and then buy a 60mb data bundle for R6 that lasts the day and keep doing that I don't have a problem. EVERYTHING TIME WITHOUT FAIL that I load R50 or more and do the same as above Vodacom does not seem to exchange the data although the message tells me it does then suddenly my messages aren't going through and I check I have no airtime! I have phoned every time and keep getting taken through the same thing and it's none of what I am told. When I got my smartphone I made sure I took all precautions as to savor my data I'm not an idiot! My apps only update when I am connected to WiFi and all my background data is switched of! I am sick of losing money! In total I have lost R400! ****************! This has happened 3 times! It is not my fault it is something on your side and I want it fixes and my airtime refunded! After that I am moving back to Cell c I never had this problem. I was stupid to move in the first place! I have asked to have this escalated. I hope it gets resolved!