Unfair treatment

On the 27/08/2020 I transferred the money from my Nedbank account to another account of mine(standard bank). The amount was R50000. The following day I received a call from standard bank saying Nedbank said that transaction is a *****. Question is why they didn’t call me? They blocked my app my card. I went to the branch (cape gate) to solve the problem but it was not solved. They gave me a profile number and pin. Even now I can’t access my account which is very unfair. When I call the call Centre they said I must go to the branch. I don’t understand why must I waist my money to call or go to the branch using my money. What Nedbank is doing to me is uncalled for.