FLYSAFAIR- INCORRECT BOARDING PASS ISSUED AND LOST BAGGAGE

I flew on Safair out of Dbn on 24 July at 9.40pm. Flight FA 399. I was issued a boarding pass in the name of another passenger and my bag was checked in under this passenger's name. I did not check my boarding pass. When I arrived in Jhb at 10.30pm, my bag did not arrive from Dbn. The lost baggage claims was closed. I contacted Flysafair today. I was informed was at Dbn airport. I asked to pay for my bag and my bag sent to Jhb. Flysafair says this is not possible and I am being blamed for the boarding pass being issued in the wrong name. Flysafair MANAGEMENT PLS RESPOND