Horrible service and unwillingness to actually help!

After receiving an email yesterday that any ticket can be upgraded to an option that allows for vouchers as a reimbur*****t! After calling numerous times yesterday and today, I was advised that it can only be done the day the email was received? Only to be told now that I can’t do it because it wasn’t done at checkout! Which wasn’t stipulated on the email! I find this absolutely ridiculous! I am unable to travel as my daughter is sick! I am disgusted by this service! After speaking to an operator that constantly interrupted me, I help on for the supervisor who was “busy” and I was told by the operator that her supervisor would advise me the exact same explanation! I’m unsure what the problem is! It’s not that I am asking for a refund! I want a voucher to fly at a later stage once my daughter is better and fit for travel! The attitude and service I got is horrific and I will be warning everyone not to go through this company as they are full of empty promises and misleading information! I am now fed up! Over R300,00 airtime to get hold of people who aren’t even willing to assist! Waste of time and money! Absolutely useless!!!!!!!