I have been with MTN for the last 5 years - I have always had a block on the limit of calls that I can make each month. I have NEVER had trouble in the past with MTN to block my phone once I have reached my call limit!!! Over the past few months however, I have had accounts of R800 instead of a blocked R400 (including contract costs) - because 'sorry, our system doesn't always work properly'!!! This is not a valid reason!!! This is TOTALLY UNACCEPTABLE! I have phoned the operators every month so that they can take notice of thi... read full review »