Nedbank Deceased Payments Department - you can't call us ONLY email, We'll keep your money

It has proved to be impossible to telephone or speak with anyone in the Nedbank Deceased Payments department. THEY DO NOT HAVE A TELEPHONE AND ONLY COMMUNICATE VIA EMAIL. I am dealing with a deceased estate and am the executor, together with our family lawyers, we have been trying for more than three months to close a deceased estate banking account and transfer the funds to the late estate bank account. Sent countless emails, unable to raise any meaningful response. Two separate bank visits and numerous calls to head office, we get the same response... "we cant help you sir because that department does NOT have a telephone. This is also confirmed by Nedbank head office legal department. Unable to gain access to R150 000 in my late fathers bank account. This is the only outstanding order of business before we can settle and close his estate. Deceased estate lodged in June 2022.