Being a loyal client counts against me.

I have been with MTN for almost 20 years, and this seems to be the issue. Whenever I call, I am advised I am on the old system, and they will need to transfer me again. This keeps on happening and delays me getting assistance. This morning on my 3rd transfer call got cut, and I am still not helped. Some numbers I am dialing is stating they do not exist, this is impossible as it is for instance my wife who has had the same number for 13 years, I spoke to her on that number yesterday. Some numbers I am able to call, others not. Just want this sorted.