Ismail & Dahya attorneys law

Am really upset with this lawyers my ekhurhuleni municipality has been handed to them but the way they are running business is like they're running a ****,,I made payment arrangement with them but the keep on calling me every months telling me that I didn't pay and the will send more emails threatening me that the will take steps for me.even when I send proof of payment they won't come back to me,am really confused of this lawyers