Voyager special seems ****

Both myself and my husband have been voyager members for many years, we have accumulated loads of voyager miles. SAA is running a special at the moment where you can use your voyager miles to book flights which ends at 12 tonight. We have tried last week over the weekend and today to make bookings, we keep getting defaulted back to economy when we try booking business class. I called them just to be told there are no business class seats available May, June or July .... flying from JHB to either Munich, Frankfort, London or Paris ... this is highly frustrating and leaves one to wonder if there were ever any business class seats available for this special ... We disappointing, at this stage we want to get rid of the miles so we can say bon voyage to SAA and move on to another airline. This is not the first time, last year flying back to JHB from London in business class non of the tv's were working .... I find this very sad.