Account system errors not solved sice December 2020

I have 2 business accounts with Nedbank. 1 works perfectly, I connected it to auto bank feeds on Sage Accounting and I can send proof of accounts for the account from the Nedbank banking site. Proof that the problem with the other account is not with me. I cannot link the other account to Sage nor can I send proof of account (the error says there is a system error). I have emailed and called Nedbank many times since DECEMBER 2020 but the problem has still not been solved by Nedbank. I have wasted hours on this, as I now have to import bank statements manually, and I have spent time writing emails and holding on the phone - today nearly 10 minutes without an answer from the SBS center and the relationship manager. I am listening to their message re high call volumes for 10 minutes and I wonder if they think their customer have all the time in the world - only they are busy? NOT IMPRESSED AT ALL