If you have a MRP Money store card dial *140#
and choose the "buy airtime or data bundles" option (non-store card holders can only buy data bundles on *140#). Store card holders can also dial *130*410#
and follow the instructions (this number is only for buying airtime). Store card and non-store can holders can buy airtime at any Mr Price, Mr Price Home, Mr Price Sport, Miladys and Sheet Street store.