complain to MTN about de***** on the expired account

I reported to MTN about my account which was de*****ed. I reported this to MTN on the 20th December 2017. Up until today my issue has not been resolve. No communication about my issue and I'm losing money every month. MTN is not even worried about my matter each and every time I sent them an email to encounter about the issue, The response is "issue reported to ***** dept" That is the response all the time. I'm truly stuck and not sure what to do now.