Bad service

I bought free minutes for 7 days. Finished my daily usage and then bought Chat for 30 minutes. I received an sms that I can use the minutes. I made a call to a Vodacom number and all my remaining balance on phone was used instead of Chat 30 minutes. I phoned and complained i was told that there was a problem and I will be able to use them the next day. On Sunday I checked my balance and 30 free minutes not there. I phoned again and had a service request done. Today I get an sms that my R4. Has been refunded…what about the money that was used during that time when I thought I was using free minutes? In the past month it was my DATA consumed at high rate…Now this??? Is this FAIR?