Is genenoristy with the expectation of Divine reward selfish and less admirable?

If you help me because you want Allah to give you rewards or presents , then there's nothing special about your kindness , isn't it?. I would say that an Atheist helping other people is BETTER than a Moslem helping other people because they want Allah to give him 'presents' in returns (sorry to say this). There is no sincere thing on this planet. Would believers still help other people if Allah were never promise them anything, Allah never punishes them, and heaven and hell don't exist??