MTN representative now ignoring my emails

I previously logged a review stating how MTN had not allocated the data to my account correctly. They have now fixed the problem but the MTN representative Mr Mike Ramaboka is now ignoring my emails regarding the data from the previous months paid for but not received. To make it worse when I now run the USSD function on my MiFi device to see my data balances the response is "UNKNOWN APPLICATION". Once again the MTN customer service is completely useless. So I guess now I wait to see if anyone from MTN will respond to this review otherwise its back to paying for something your not getting. VIVA MTN