Can't use my credit to fly in December

I booked a return flight with Kulula in February to travel in May. Unfortunately, due to COVID-19 I was not able to travel.

I know really need to fly to visit my parents as my mother is extremely ill.

I have phoned the call centre so many times and hung on the line for ages, only to get cut-off, really? That’s shocking. When I finally got through, I was advised that I can only use my credit from 11 January 2021, WHY?????

I need to fly now in December and in my current job I know that I will not be able to utilise my ticket from 11 January to May when it expires. So Kulula thanks for nothing, you have ****** money from me.

I really don’t understand the logic behind this and as my preferred airline, I can guarantee I will never use them again!!