Vodacom madeforsummer - unable to use voucher - pathetic customer communication and service

I have spoken on numerous occasions to an agent ****** regarding my flight center voucher. She informed me that I can travel until the end of March. I called in November to enquire as I planned to travel in December and I was afraid that I was going to lose the voucher... when I called she reassured me I can travel in March. On the 4th of January I called again to double check as my brother has the same vouchers and he was told he can travel in feb the latest... she reassured me again that I can use the vouchers in March. When I emailed flight center they now tell me I can only travel until the 28th of feb?? This is insanely pathetic. From the start I had to call over and over for a pin code ... up until today I have not received an SMS with the pin code as promised and flight center can not find my voucher with the pin given to me telephonically by the said *****. I am asked for my I’d number all the time? I planned to travel in March with the information I was given