NEDBANK HELP REQUIRED.

I use Sage Accounting online. Up until 3 months ago Sage was able to upload transactions from my Nedbank account. 3 months ago Sage was able to connect to my Nedbank profile but the business bank account was no longer an option to link to. I, therefore, cannot upload the bank transactions. Sage have been extremely helpful but the problem is not on their side. I have contacted my Nedbank business banker, the bank helpline and so on to no avail. Every 'solution' they suggest does not work. I need someone who knows why my business account will not link to Sage.