Customer services at most Nigerian banks are horrible!
I have experience with GTBank and Zenith Bank. The customer service section are mostly under-staffed, and one ends up spending long hours on queues for something that normally should take just a few minutes to sort out.
Zenith Bank Rumuokoro Branch, Port Harcourt is a classic example. I have been standing on queue for over an hour now and all I came in here to do is just to activate my ATM card. There are no seats for the customers to sit on, and the ladies attending to the customers are obviously not in a hurry to attend to you; it's annoying as it is frustrating!
Some of them are plain rude, and they do so silently.
Perhaps other banks do better. Do share your own experience!