Mercantile capitac business banking horrid service

Ok so I am not sure if I am the only person livid with capitac business banking division they are completely useless ,I have had this business account for the past 2 years can not make a transaction the staff at branch level have to call an agent who is completely useless the app does not work ,I will like a response with a number of someone with knowledge who can help me close this account I really did make a mistake and just keep transferring funds to keep this account opened ,no purpose in using standard bank and trying to give capitac business banking a chance when the whol system is up to **** ...