how to stop (M.T.N) from deducting your credit balance
first and foremost , you have to check which service is deducting your credit balance by dialling *123*15#
* And then input 1 and send to see the active service(S)
* Enter the number of the particular active service you want to stop and send
*input the "Deactivated " number and send , A deactivation confirmation SMS will be sent to you..
* Repeat this if you have lots of active service and want to deactivate them...