Worst Banking Service Ever Experienced

We as a business has been trying to close an account for the past month now. No one replies to any of the 15 follow up emails that was already sent. The excuse was that the person who can assist us was sick. Then we were assured that this will be escalated to the manager and processed. Till this day way are still waiting for an email reply, after a month and then we phoned this morning again. Same response. This will be escalated to managers. What a ridiculous bank this is with no service at all.