Vodacom unable to help with wrong paperwork

On Friday 1 April 2016, I did an upgrade on one of my contracts at the Smartcom store in Vodacom world. With the upgrade, I also did a sim swop and migration. The lady that helped me did it in the wrong order, and because the migration will only go through on 1 May, the sim swop will only follow after that. Since Saturday I am trying to sort this out with smartcom, but they say that Vodacom refuse to correct this and they must fill in a request to cancel everything and redo the whole upgrade which could take up to a week, and the way I know the poor service from Vodacom and Smartcom I'll be happy if it's done this month. Now I, who are the customer, are left with the inconvenience because Smartcom was incompatent and Vodacom does not care to assist. Please sort this out ASAP or I am left with no other choice but to cancel yet another contract with Vodacom due to lack of service.