Exhausted all avenues to get customer service

<p>I am a Platinum SAA member and I used Voyager miles to buy an economy ticket from OR Thambo to Washington for 18 July 2016. I want to upgrade to business class and I am prepared to pay but 8 SAA employees just tell the same story - I CANNOT. I am surprised that a company with more than a R1 billion debt is refusing to accept a customer to pay for an upgrade to business class. Even a customer service's lady said they only help customers after their flights. Is there anyone at SAA with a business and customer care attitude? How can I get assistance to service?</p>