Bad customer service

The African bank customer service is so boring they take long to respond. The email they take long to respond for them to call you back it takes long you would call them today request for a call back you would end up resolving everything by yourself then when they call you nolonger need their help. They not helpful I've been waiting to be called back since last week yesterday I request for a call back this guy told me when they don't have incoming calls they will call me til today nix and that time they chew airtime when you call them... please invent a way where customers can get help easily and speedily for all services not only for loans