Anarchy is defined as "a state of disorder due to absence or non-recognition of authority." Capitalism is defined as "an economic and political system in which a country's trade and industry are controlled by private owners for profit, rather than by the state."
A SYSTEM of trade and industry CONTROLLED by private owners is pretty fucking far from disorder and lack of authority.
As I have clearly demonstrated, anarchism and capitalism directly contradict each other by very definition. That does not mean that components of both can not be combined to create something else.