GATVOL!!!!!!!!!!!!!!!

This is now probably the 7th complaint I have logged in regards to my WiFi, for the last couple months my night express has not been working. I keep being told it's being looked at or it has been sent to the billing department but it still is not working and now my day data is finished because of this mess. The previous response I was told to restart my device at 12:01 which forced me to stay up till that time to do it, I am human and do need to sleep. Phoning the call centre or ********** does not help either as I get referred back and forth. I want this resolved, I am paying for a service and not receiving it and I am now getting gatvol as I have to run after MTN so you can do your job. This is technically a breach of contract as I signed for 2GB of day data and 2GB night express but I can't use the night express. I don't understand why this has to be so difficult!!!! Your customer service leaves a lot too be desired