Mtn Contract Data *******

My wife upgraded her contract on black Friday deal.(50gig + 50gig free anytime and 50gig + 50gig free midnight bundle). For the past 3 months account balance was 184gig when checked on 12th when data is received. Receive sms that account has been loaded with 230gig. I've phoned the call centre numerous times and all they good is,is to give reference numbers. There respond time to resolve issues is pathetic,poor,bad when it comes to customer services. Whenever you log a complaint it sure takes long for them to respond. According to there system right amount data was loaded but when I checked balance it was not the same. I've send them pictures as proof but still the same story when they respond"Kindly be advised that according to our system, you have been provisioned accordingly with 130GB Anytime data and night 100GB Night express. Please dial *136*1# to check your balances". Regards Sharief