Loan money not available after 7 working days

I phoned in on Monday 18/05/15 and accepted an increase on my revolving credit loan account. I need this money for transfer and bond costs on a house I am buying. It is now the 27/05/15 and the funds are still not available after they told me it will take no longer than 48 hours for the funds to be available. I am now in danger of losing the purchase of my house!!! I phoned today and they told me it was the Boksburg branch that was supposed to release the funds which they never did and I now need to go into the branch with my ID to release the funds. I am nowhere near the Boksburg branch and now they are making their mistake my problem to solve. I am very upset and even thinking of switching to a different bank!!!