If they will not reset and its on the any circuit other than the sockets, please give us a call. If socket circuit, unplug anything plugged into socket outlets. Try reset the fuse/MCB again. If the fuse/MCB/RCD does not reset get in touch with us. If the fuse/MCB/RCD does reset, plug each item in one at a time until the appliance trips the fuse/MCB/RCD, thus proving the appliance causing the issue.