Disgusted services at Sars

I went into the branch and changed my banking details as I received an auto assessment. I did notify the agent that my reason for changing was that I needed the returns to be paid into my new account. I was assured by the agent that after my banking details have been updated and I get an email within 48 hours I can accept the auto assessment which I did. Few days later after accepting it, it goes into my old banking details. I was highly frustrated and called sars they were so rude I logged in a query twice. I wemt into the branch and was advised they will try and assist. This was not my fault at all I did exactly what the agent advised. I am a single parent who requires these funds and sars did the incorrect thing and says they can't assist me. This is disgusting I will not leave this as this was not my fault but ghta of sars.