Free Me Boost and free airtime false advertising

Good day, I purchased airtime as well as a free Me boost bundle. Instead of using my free airtime first it has been using my bundle. Unfortunately his is not the first time this is happening and its unacceptable. I have lost thousands of free airtime and have to keep loading because of this. Right now I'm sitting with 600 free airtime I can't use and 105 airtime which web to waste that I could not even use for data. Your agents told me this is an issue that you are having, and I feel its unacceptable that customers are being ******. Secondly I have called numerous times and logged queries and have two care numbers for the same thing that has not been resolved. One to your agents made me hold for almost 30 minutes and never returned to the call and instead the call was eventually answered by another agent. I've now had it with this. I want a refund or a solution to this as this is false advertising and theft. I am not going to call the call centre again as clearly nothing gets resolved. You are falsely advertising to customers and this is not acceptable. I would like feedback as a matter of urgency.