If you want just exchange, then they should exchange it without problem, I think so. On the other hand, if you want to return them, then I think they should give you store credit if you do not have receipt. But it depends on store policy.
Also I think Singapore is far away from Africa or I am wrong?
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.