DSV - Refusing to contact me on alternative number

I did a upgrade on my MTN contract...

I am only available on the main number of the contract and not the upgraded number, but yhey refuse to phone me on a alternative number.

This was verified with MTN so I can't even see what the problem is. I want this matter to be sorted by tomorrow and the phone delivered as this is getting ridiculous. If I miss a call and phone back, there is no answer. I asked my daughter to see if ahe could get hold of you to notify that I am available after which if was refused to call me once again