MTN their *** means less than nothing

After my previous review advising that neither my wife nor I could send emails on our IPhones, MTN contacted me and suggested that I visit their nearest branch. I went to their Melrose Arch branch. They could not assist at all and sent me to the I-doctor. He reset our phone settings. After the adjustment, my wife and I could send emails for 24 hours but this morning could once again no longer do so. This has been going on for over a week. To mention MTN and “service” in the same sentence an insult to the word “service”. We are totally disgusted.