Free Will vs Sharia Law

I've been taught that Allah gives us free will, not the free will in philosophical and destiny terms I'm making reference to the free will of either practicing Islam, choosing to wear hijab, to drink or not to drink etc. which I all understand full well and am content with. However Sharia law makes the disobedience of those acts punishable by either lashing or time in prison. My question is, how do we have free will when in fact Sharia Law which is Gods law, doesn't give us free will. Ultimately we don't have free will otherwise it seems contradictory to say we do.