Cant book a holiday however hard I try

Impossible to book a package holiday on Kulula! Whatever dates you put in it just says... Sorry, but we are struggling to confirm a package for you over the date period selected. For further assistance, please contact us on ********** 852 for assistance. If you dial the number it doesn't go through. Why in 2018 can't an SA company have a website that works?!! A joke and shame on you. Surely any company with half a brain could work it so it shows you what is available and on what dates rather than just playing pot luck with dates not knowing prices or availability until you have gone through the whole process only to be told NO! Its the same on Mango. Family of 6 trying to spend 100k on a package holiday somewhere but you dont want my money, I will keep it and spend elsewhere. Maybe one day you will get a proper website, I somehow doubt it though.