MTN service useless

On top of my two cellphone contracts at MTN, I want to add another two contracts for my children. On Saturday, 2 December, I went to the MTN Superstore in Clearwater Mall to apply for the extra two contracts. Suddenly, they can't provide this two extra contracts, as it needs to be 'approved'. Not telling me it is a credit approval, just promising it will take 2 - 24 hours. This is now Monday afternoon, 48 hours later, they are telling me that they have a backlog of credit checks, because of Black Friday? How is this possible, as you can, with just checking someone's ID check if there is any credit problems? I do think MTN is not giving good service at this stage.