Keep getting postponed

I called Woolworths last week to ask for a limit increade on my Store Card, I was told to call back on the 12th November (which I did) as they could only do credit checks then. Today 12th of November I called them again only to be told to call again on the 18th of November. Surely its in their favour if I increase my limit as I pay interest on this card, yet apparently nothing can be done. Not the type of Service I expected from a company like Woolies. Very dissapointed as I was wanting to make a purchase on my Store card.