Shocking MTN service

I have been a loyal customer to MTN Mobile for over 20 years. Have tried to call their retentions department 5 times after visiting an MTN consultant at the Table bay Mall facility who was unable to assist me. Every time i spoke with a consultant i was referred to their HO retentions department saying that i am their legacy platform and on HO can help me and on each occasion the consultant tried to connect me and i was cut off. At 11h53 i asked for a manager to please contact me (All were busy in a meeting?) and now an hour later still no response. The number that was given to me for HO retentions (***) says that the number does not exist. Obviously a client like myself who has paid many thousands to MTN is not important enough for such a big company to care about??? Very disappointing and after all this time maybe Vodacom should get a new MTN client?