FlySafair Rude Manager

Was pulled aside at the boarding gate due to my certified ID copy being out of date according to the staff member. I was made to wait and reprimanded by the staff member and then a manager was called. I asked how was my bag allowed to be checked-in without anyone mentioning this to me. She responded that she didn't know and threatened that she would take my bag off in future should I do this again. She then asked me how am I able to apply for a job without having a certified ID that is recent. I used the same ID copy a week before on a flight and nothing was ever mentioned to me. Even if I was in the wrong, no one informed me at the check in counter and no customer should be made a scene with infront of others. Also, my job is none of your business. Thanks Safair. I'll fly another airline next time.