MTN have been deducting credit recklessly on people's phone now.The lest you can call on MTN zone for those on MTN zone is 8k/s even at off peak period.
MTN now abundantly send messages to you so that you can send a message to a code to receive free stuffs only to deduct money from your phone.
MTN usually give free credit and freebiz to it customers during festive period,but noting like that this year.
Like this if you are expericing these.

There is global crisis (global economy meltdown ) imagine nobody can buy banga for xmass,little kid are wise now , everything dry , no money for banga