Unable to make contact with the company

I am a US citizen, planning to visit South Africa for this reason I booked local flights through eDreams however one of the flights was incorrectly booked, since I paid insurance upfront to be able to make changes to those flights I have been trying to contact the call centre for more than a week now, it has cost me more than $50 just to hold on the line in the hope that someone will eventually pick up the call. This is ridiculous because I need the flight to be changed, over and above that Flysafair recommended I contact eDreams through Facebook which I did only to be told by a bot that I should contact the UK office, are these people for real? Then to make matters worse Flysafair also advised that only my name and booking reference was correct the rest of my details were incomplete and incorrect. Can someone refer me to personnel at eDreams with whom I can escalate the matter or for me to be able to acquire assistance from a living breathing person? Thank you