SAA Standards Dropping

I traveled with SAA between Johannesburg and New York. On both trips the In-Flight entertainment was not functional. I made the airline aware of it and nothing was done. When arriving I sent in a complaint about it and nothing was done. SAA said they would come back to me about it and nothing was done. I then contacted their head of operations and nothing was done. When an airline does not care about improvement, you have to doubt their standards.