No wonder Greyhound Coaches went belly up

Due to no fault of my own I have been charged R1000 more than the ticket I eventually managed to their staff in JHB to send on. Since then I had been unsuccessfully tried to claim the R1000 after filling in all their forms and sending proof of all documents in December. I was told that payment would be made in one week, but while they were quick to receive payment, it has now been 3 weeks and I cannot get hold of them. I have proof of all the emails I sent without receiving even an acknowledgement as I requested. It has been bought out by FlixBus, not Citiliner. The only CEO I could find online is residing in Germany.