Kulula cannot issue invoice for accommodation

I made a booking with Kulula in June for accommodation in July. I requested an invoice for the stay on 25 June 2018 and was told I will get one after my stay. I then wrote back on 9th July 2018 and requested the invoice and received a response that I will get one during the course of the day. I did not receive one. I wrote back on the 23 July 2018 to which the lady at Kulula wrote to her colleague on 24 July requesting an invoice for me. The response received on 25th July was that the system was down. I wrote back on 2 August again with no response to my email. I have sent another email today 14 August 2018 and have received no response so far.

Kulula is legally obliged to provide the customer with a tax invoice, and I cannot believe that this is so difficult to get. My booking reference was JR3UY66.