Once in a BCAL DC10, We were cleared to land at KANO by the approach controller. When on the runway we were instructed to contact the tower for taxi instructions. When we called the tower and requested taxi instructions he refused to give them as we hadn't cleared to land by the tower. We pointed out that we had landed but he insisted we ask him for landing clearance before he would allow us to taxi to the gate!! Oh well, it was Africa.