Not able to make purchase via site

Flysafair have advertised their R1 flights promotion. I have been trying to make a purchase since 7am this morning but their website is down ( I have the screenshot of the error page ). They clearly do not have the infrastructure to cope with the promotion they have advertised. This is an online only deal and I've been trying to call the call center to inquire if I can make a purchase any other way but I just receive the recorded message for 30 mins before giving up and hanging up. Their facebook page says that their website is not down but cannot cope with the overwhelming response. However I have a screenshot of the error message from their website. <br> <br> <br> This is very frustrating and I will definitely think twice about using them again !!!