Unauthorized payment change from Association to Management Company

The Management Company has changed. Our Board has recently hired a new one. I have made my monthly assessment payment to the Condo Association for 38 years. When I checked my bank account, it listed the new Management Company as the payee, not the Condo Association. 

I did not authorize any change in payment. I contacted the Management Company, who has not responded to me. When I called the Board President, she said she was too busy to talk. I would appreciate your opinion on this. Thank you.