Held at ransom

On the 25th of April my business account was restricted by Standard Bank because a client falsely accused me of not supplying his NP 300 engine in Zambia. I never received any communication from my banker regarding this matter I only discoverd this myself on the morning of the 31st of May. I emailed all the invoices from my suppliers and a police affidavit to transactional ***** to show that the client is not being truthful on the 7th of June and the Aphiwe responded that they will get back to me. On the 6th of June, a person known to my husband as an associate of the Zambian client arrived at our workshop and assaulted my husband saying that he is coming to fetch the engine on the Zambian client's instruction and even did a video call to the client to say he is at the workshop. The very same person has been taking my pictures without my permission and using them to send death threats to my husband and alluding that he knows where I work, what car I drive etc. On the 8th the same guy went to the workshop with another big man to go attack again and they were arrested. I guess its right for the Zambian client to have my account restricted and also send people to attack us to make sure he gets what he want. On the 6th I made contact with the client after the assault and he said all he wants is an engine he thought he was de*****ed. We agreed and on the 8th we got a new engine for him and he advised us to deliver us to a certain gentleman in Berea. This was done to the tee according to his instructions on the 12th of June and the gentleman signed off a delivery note as an acknowledgement that the engine was received. The very same day I sent the delivery note to the bank and Siyabonga responded to my mail. Since the the 31st to date Ive been calling Standard bank and talking to the relationship banker Nomathemba including a whole lot of people who keeps escalating the matter to no avail. I feel Im being held at ransom and being punished by the bank because they are holding on to my money and the client has the engine. As a loyal client to Standard bank I have not been afforded the protection I deserve from them. Yesterday I called in again to ask that at least they must refund one of the clients who paid into that account without my knowledge on the 15th of June then they can continue holding on to the rest of the money because another ***** case is coming my way. I dont see any end in sight pertaining to this matter the best thing to do is to close all my other accounts and move my business elsewhere they can keep that money its okay.