You can get your OPay ATM card at official OPay customer centers in Lagos or request it directly inside the app, but for pick up, here are popular places in Lagos to get it:

OPay Head Office / Customer Center, Software company
 Address: Alexander House, Plot 9, Dr Nurudeen Olowopopo Way, Alausa, Ikeja, Lagos. Open daily 8:00 AM – 4:00 PM.

OPay Allen Office, Financial institution
This place weekdays they open weekdays from 9:00 AM – 5:00 PM. They are located at No 103 Allen Avenue, Ikeja, Lagos. Before going, make sure you take your phone with an OPay account, a valid ID, and BVN/NIN details.

So if you want the easiest option in Lagos, just go to Ikeja Alausa or Allen, that’s usually where most people collect theirs fast.