SSDA MTN

Good Day I have my MTN Account hand over to SSDA and I have been struggling to get hold of them to sorted my account out. I have emailed and phone I got no response back on how to pay that account of my . I'm struggling to get my self sorted because of this Account please if any1 can help me remove this MTN Account off of my name il appreciate it. You can email me at tashniyageorge4@gmail.com thank you