Rude Customer Service Clerk

I called the MFC regarding making a payment for my car as the deduction did not go through on my new account, a clerk named Henry Nxumalo was rude and did not even want to listen to my query. He wanted to give me the bank details which I explained earlier that I have received. all I wanted to know is if I should fax them a proof of payment after I made the deposit but this Henry guy kept talking over men and did what he wanted on my expense and then hanged up the phone on my ear as if he had called me. I mean that was bad service at its best why will I call them if they wont assist me.