Vodacom Extra Airtime is just a waste of time.

I complained about this about 2 months ago and I noticed that it’s happening again. I bought R29 Vodacom airtime and was given R29 airtime free. After using my normal airtime the call cut off and it didn’t use my extra airtime. It used to to use the extra airtime before. So I loaded another R12 airtime and was given R12 airtime free again. But come 12 midnight the airtime will vanish without it being used. What’s the use of calling it free airtime? It’s not free. It’s just a waste of time. I’m sure Vodacom’s opposition companies will honour their Extra Airtime. Not Vodacom. Sick and tired of **** service. Regards Vinny