Kulula blocking me and refusing to give refund

I was waiting at the check in counters after checking in online hours ago and just needed boarding pass and to drop off my bag... Was on time and all of a sudden after check in lady hands me my boarding pass she tells me I can't take my big bag, we asked for the manager he apparently closed the flight then came to attend to myself and another lady. Manager was rude and physically pushed us out of the way with his bag in a hurry to go home before the flight even pushed back then he had an argument with another lady and ended up calling security on us. I have never been so annoyed. Now I am blocked off Kulula and flysafair flights because they say that apparently the lady was fighting on my behalf but the fact is i didn't do anything instead I am paying for another persons deeds which makes no sense and I am getting calls from Police that are now also interfering with my job and calling my work place and threatening to arrest me as if I broke the law which I have never done. I have been so inconvenienced and now this is costly for me as well as messing up my reputation at work I am thinking of going to lawyers about this matter.