Once again MTN's customer service is disappointing

<p>I have moved overseas, and want to convert my subscription to a pay-as-you-go. I don't want to cancel the account, and I don't want to give up my cell number either. </p> <p> </p> <p>MTN simply told me to 'dial 808'. This does not work if you are abroad. And they are now getting full payment each month for a subscription I'm not using. Very frustrating!</p>