Can't withdraw and no answers

I am unable to use my Standard bank card for withdrawals even though the available balance shows on the slip, internet banking and cellphone banking. Contacted General Banking and spoke to Bongani who first told me the funds are not available. meanwhile I had made a payment the morning and the funds are available. My daily limit has also not been exceeded. I was then placed on hold for about 15 minutes while the technical guys had a look after which i was told to go withdraw at a branch. Not working for me as I am at work and refuse to pay the high cash withdrawal fee if i go to a branch. And that would also not help me with the problem I have of not being able to use my card. If I go to a branch now it would only be to close this account as no one seems to know what is going on. I'd appreciate someone to get back to me to resolve my issue. I refuse to go to a branch. It is inconvenient