Poor service

I have been a regular flyer on SAA some nice approximately 2001 and have been a voyager member since about the same time as well.<br> However I am now going to review my support of your airline along with other Star Alliance partners where ever I can after the absolute shocking treatment I received from your Port Elizabeth ground staff (the supervisor at the boarding gate in particular) on 9th December 2015 when boarding SA422 to Johannesburg. <br> I have checked in the previous evening on aisle seat 21C. On boarding the supervisor informs me that she had to move me- I was OK with this but I was not OK with her moving me to a middle seat. <br> She insisted that the flight was full and there are no other seats available. I asked her about business class and told me this was also full. When I did not accept this she began to off load me.<br> I asked her then to put me on another flight and she says their are none- this was a lie. I asked for a refund and she said she cannot do that (another lie) and further threatened to off load me if I do not board, and if I miss the flight I will have to buy a new ticket in the morning.<br> <br> I took my original boarding pass and and headed for the plane. She ran a