Overbooking and bad service

Kulula.com overbooked their flights. Which means that my boyfriend that I haven't seen in 3 months is delayed. They then promised a seat on a flight that leaves 10 minutes later, only minutes later to go back on that promise and only offer a flight 2 hours later. This is really not how you want to spend your Christmas weekend after booking and planning months ahead. After all of this, which is already an inconvenience, they refused to give him vouchers to use at the airport because the wait wasn't long enough for that. I find this customer service apalling, since all of this was because of fault on their side. You would expect them to go out of their way to minimise the inconvenience. On top of all of this,, the customer service desk for Kulula was simply closed with nobody to assist with anything. I'm very disappointed in Kulula, being a frequent Kulula flyer myself.