Standard Bank

I'm at Standard Bank Port Alfred branch now, my business account is blocked for security reasons so they say, I had funds deposited Friday and appeared Saturday on my side and the account has been blocked since then and when I tried accessing the funds today I couldn't so I went in and I was told to bring a proof of payment from my client which I did. Now I'm battling to pay my suppliers so I can effectively render the service to my clients because of this nonsensical thing and it's not the first time this happens. I'm fuming right about now. These people are sending from pillar to post to a point of requesting an invoice I submitted to my client which isn't their business but mine.