COMMUNICATION GIANT- DONT ANSWER PHONES,NO EMAILS

10am today I saw emails sent from my iphone and ipad stuck in the outbox. Pop up message 'connection to the outgoing server [URL Removed] failed. My work is on site, not office bound. It is essential that I can communicate by email with suppliers and clients. I called MTN Steenberg to ask if they were aware of a server issue. After calling for 2 hours, experiencing lengthy ringing, no opportunity to leave a message, and calls being cancelled, I sms'd Anthea Hendricks (manager?). She responded immediately that she was off sick. I advised her that the shop was not answering ***, the number I have for them. This was at 12.33. Another 2 hours trying to call them, and the MTN call centre on 1555, no answers!. 2 hours later I sms'd Anthea to ask for an alternate number. She gave me ***. I tried for 1.5 hrs - no answer. I cancelled a client visit so that I could get to the shop to talk to them to establish if the server fault was mine or theirs. I asked them to check phone lines, they were working. GHAARIF, GRANT, YASIEMM on duty. No explanation for why phone not answered, nor why no option to leave message. 'speak to management' I was told. SERVER PROBLEM IS WITH MTN!!!