Trapped at Ethiopian airline

I had an accident on my way to the airport in Johannesburg which led me to miss my flight,I arrived at the airport I need to pay penalty to get in the next flight,it’s day time the lady searches for the next seat and give me the amount needed to pay then she tells me they’re office closes at 3 afternoon not even bothered to tell when is the next flight neither when to pay all she said was you can get on the same flight tomorrow and rolled down the window,I left cape back the next day I go to the same office I find it closed,waited till even close to the boarding time I went to the airport information desk where I was told the office will open estimated around midnight as that’s the only time they’ll have a flight,I called they’re call center number no response countless times,3rd day back to the airport again still office closed,I ask the nearest office when are they opening I was told they have 2 offices then was directed to the open one ,1st the closed office has no sign that tells clients about the next office,I get to the second office same lady who helped previously now tells me that price has changed secondly no flights for 3days,none of Ethiopian airline office staff has name tag,I asked for a manager a very rude guy came over also no name tag,1st thing he says what’s the problem no greeting no manners at all,I asked for his name he refused to give he then ask the assistant what is the problem,she explains something they all go to the office next thing I see the guy walks out of the office and leave,as he leaves I asked the lady am I being helped she told me to follow the manager and ask him,this was the worst nightmare of my life never again fly with this airline,compromise myself so much for few bucks,I wrote to the head office page on Facebook that didn’t help also.