Lack of good service

I was on a flight JE 145. The flight was delayed for 6 hours or more going to CT. I was happy to get a voucher for R500. I called Mango to claim it on the 30th December 2015 as I needed to travel. I was told I'd get it in 24 hours. I called the following day as I had not received it. I was told the person who told me was wrong it takes 48 hours. As I really needed to use it on the 1st Jan 2016 I called again to be told that it's 72 hours that I needed to wait for. Is this the kind of service that Mango provides? Everything must be delayed. These are the thing that render us as taxpayers useless as I pay for Mango to be in service and yet the type of service I get makes me feel that I as a taxpayer am making a useless contribution. Mango you are a useless service provider.