Central banks

is there a body or organisation that control central banks

Every country that prints a currency has their own version of a central bank that is controlled by the political authority under which they operate. The European Central Bank is an exception. It gets it's legal authority from a treaty among the member countries and changes outside the treaty must be approved by all of the member countries. There are banks for supporting currency exchanges and associations of central banks that facilitate information exchange but they do not control the system. Control comes from the political authority.