MTN Service Desk is like a void.

This is the second time I have had to resort to Hellopeter to get MTN to resolve a problem. MTN is getting as bad as Vodacom and I sincerely hope something will be done. One of my MTN SIMs does not send 'Outgoing Call' identity, despite the setting for 'Number displayed in outgoing calls' on the phone being correct. Even when the SIM card is inserted into another device, it still shows 'Private' when calls are made. Factory reset did not help either. It has been 6 months and at least 5 calls I lodged with MTN, but the problem persists. Worse is the fact that I have to repeat the problem every time, and as I discovered, the call takers logged faults different to what I reported. Despite it being 'escalated' every time, nothing is done and they never get back to me. Even the last agent that did respond by email once, has gone silent.