Voyager Miles

Once again my voyager miles have not been credited to my account, I have done everything possible to prevent this happening, I do not leave the check in counter without having my voyager number printed in my boarding pass yet you still frequently do not credit my account I get the feeling that you purposely omit crediting earned miles to people to save money and the process to get them credited is so tedious that most people give up. I strongly urge any one flying to give SAA a skip