Mango possible *******ion

I booked in early for my flght at 17h05 Durban to Cape Town at window seat emergency row 15A<br> <br> When I checked in at the passage leading into the aeroplane i was told by a airhostess that I was to be sitting at another seat. I refused as I specifically booked in 2 hours prior in order to het a good seat.<br> <br> With great effort the hostess approaced the passenger sitting at seat 15A and after a argument before other guests did the person agree to leave. It was clear that somebody at Mango was promted to give my booked seat. Which is always a popular seat. Away to another passenger. Why the said passenger was successfull to persuade the check in official to change seats is at this point in time unclear.