Cannot Validate an Account Number

I sent a request to TymeBank to ask for Validation of an account number. I received a reply:

"Please be advised that TymeBank has no record of the account number ***XX. We have conducted a thorough search and found no evidence of any open or closed accounts associated with this number".

This reply however referred to the wrong account number and NOT the account number I needed to validate. I sent a request to asked for the confirmation of the account number I want validated, and THEN suddenly they are not allowed to verify the account number.

ABSA advised that I need to ask TymeBank whether the account number I used does exist. According to ABSA, this is information that TymeBank MAY and MUST provide. ABSA can not do a inter-bank request unless they know that it is a valid account number.

TymeBank is just not willing to confirm whether the account number exists as they "cannot provide personal information". I DO NOT WANT PERSONAL INFORMATION OF THE ACCOUNT HOLDER, only a VALIDATION whether an account NUMBER does exist.

Confirming whether an account number exists or not, is NOT contravention of the POPI act as NO PERSONAL INFORMATION is required,