Why is my balance still reading 4 naira after I recharged 8400 naira yesterday? The mount isn't reflecting yet.

Hi Jammal, you need contact MTN support for them to check your line. If your line is on Betatalk tariff plan, it is possible that the recharge was credited in your Betatalk usage main account.

You can contact MTN support via any of these channels

Twitter: @MTN180 / @MTNNG
Facebook: @MTNLoaded
Instagram: @MTNNG
Live Chat: http://bit.ly/2OC5bHz
Email: customercareng@mtn.com
Call Center: 180 or +2348031000180 (if you are calling from abroad or another network)
10.WhatsApp: • 09033000001