NEEDING HELP FROM DISCOVERY/VITALITY/KULULA/BA OR COMAIR!!

We need help! I have selected Kulula.com but quite frankly we are not sure who to review? Discovery/Vitality/ Kulula /BA/Comair ??Since the 05 January 2022(17 days ago) we have been in contact with Vitality/Kulula to help us with air tickets we are trying to book to Mauritius .WE have R12 133.68 in our travelbank from a refund from BA because we could not fly in June 2020 due to Covid restrictions. WE can see our funds on travel bank through our Kulula ID and they are expiring 12/02/2022 , hence our urgency to use the funds and get booked asap. Unfortunately when we select the flights and try to pay using travel bank, that option, for some unknown reason is not available to select !Every day we phone, speak to someone different who tells us they'll escalate it and get back to us in 48 hours !! 2 day!! TO DATE NO ONE HAS CONTACTED US BACK & NO EMAIL IS SENT TO US AND NO EXPLANATION IS GIVEN !Vitality blames Kulula, Kulula blames Comair & Comair blames BA !!This service is honestly unacceptable , we are at our wits end and stress levels creep up daily . WHO CAN HELP US PLEASE TO RESOLVE THIS MATTER ?? I do hope someone can be proactive and redeem all these companies reputations as it seems none of them care. The gentleman we spoke to 2 days ago said he would get Comair to book this for us directly ! 2 days later , nothing, and we have to phone again .The lady tells us today this is not even possible ? Our accommodation is booked & now we are battling to use our own money due to us , to book flights asap .