My Bad Experience Today

A asked me to help him this morning. I called 3 people to help him. One friend agreed to try her best to help A. After some contacts She phoned to me that she has asked her colleague to help him. If the result is come out and A succeed please thank his colleague.

This afternoon the result is come out and A passed. I said it to A and ask him to thank my freiend's colleague. A said if my freiend's colleague don't help he will succeed too. He is not willing to thank my freiend's colleague.

I am really not happy. I will not help A anymore.

If you meet such situation, what will you do?