Considering the recent development on the ban of USSD Airtime purchase, you can still recharge your phone at your convenience via the following means:

1. This is time to patronize that man that has a kiosk accross your street or at your work place. Remember, banks have deprived most of these people a huge percentage of their daily profit.

2. Secondly, you can simply Download the Gorecharge App (An App I have known for a while strictly dedicated for recharge card purchase) which is quite easy to use and you can share pins to friends, self recharge by just a click. You can even sign up as a Vendor to buy cheaper and resell at home, work place or as a business.

Link: https://play.google.com/store/apps/details?id=com.mgorecharge

My own little way of assisting you this trying time.