South African citizens must bribe to board Qatar from Namibia hosea Kutako airport

I (South African citizen) traveled from Johannesburg in South Africa on the 10th for my colleague's daughters funeral who is a Namibian citizen. The daughter passed away in December. The funeral was held in Namibia 12th of January and i was to proceed to a work meeting in lreland on the 13th today. I had a confirmation letter from the person i am meeting in Ireland, the hotel booking of €650, burial order for the person we buried, death certificate of the person, letter that states my company is covering cost for the trip, my black card cheque account, my black credit card, my business cheque card and still i was refused to check in cause i am a South African citizen boarding from Namibia. Two other south African citizen where questioned infront of me and bribed their way to board left me. The reason i was given for being denied to board was because i never had a copy of passport for the parent of the late kid. She requested me to ask the poor woman who buried her today to shoot her passport and send me on WhatsApp. She did not pick her phone cause she buried her daughter. I was denied boarding for such and because i didn't want to bribe the lady.