Be aware of the Quraniyoon

There is a group that tries to trick the Muslims and we should all be aware them and we should not fall into their error. They claim to love the Quran but they reject the Hadeeth of the Prophet ṣallallāhu 'alayhi wa sallam (peace and blessings of Allāh be upon him). They are clearly lying and they are not Muslims. How can they be when Allah subḥānahu wa ta'āla (glorified and exalted be He) says in the Quran:

And whatever the Messenger has given you – take; and what he has forbidden you – refrain from. And fear Allah…[59:7]