FNB unilateral service change

When I signed my flexibond agreement it was between myself and FNB legal representative. Two weeks ago the credit available and conditions of the flexibond was changed with prior consultation or engagement, according to my understanding it's a breach of contract? I submitted a request to reverse payment to another FNB account after realizing it was a ****. I physically went to FNB branch Centurion and completed the request and the following monday provided the FNB account to which I had transferred the funds. Todate(approximately 5 weeks now) no feedback, no refund, no phone call, nothing