I was at the MTN store just after 5 and finished just after 7pm.
I called retentions while I was in the store, but because I'm a business client, they said I have to call back tomorrow as SME/Business retentions is already closed. Anyway, I just told the consultant at the store that Retentions called me and offered me the 40 + 40 deal. She went through about 10 lists, checked on the various online systems and phoned someone for help, but couldn't find that deal or similar, so I eventually settled for the advertised 50GB + 1000 MTN Mins + 300 min @ R399. The SME contracts are only 12 months, so I added the cheapest device they had (Mifi device for R29 p/m) and got the contract for 24 months.