Funds Cannot be Used

I have a Standard Bank Credit Card. I purchase goods online at Woolworths foods. I assume that they reserve the amount (R2200+-) until they physically process the order to put the correct amount through for what they can offer and deliver (R1700+-). This was a week ago and the R1700 amount was put through and went off on my account but there is still R2200 reserved which just doesnt become available . I phoned your call centre but got no joy as they want me to phone Woolworths which doesnt make sense as there are clearly no pending transactions on the account (their amount went off) so why are the fund being kept reserved. I need this money to become available today to pay for emergency medical bills. Please assist.