Poor customer service (Student Advisor)

I requested a call back online, of which the application requires a client to select a specific time. I selected 10h00am 04/02/2022. The student advisor Lerato Mkhehle calls me at 08h43. Regardless I answer the call, even though I was busy on another call, I told her that I'm busy on answer call and did I not request for a call back @10h00. She ignores the fact that I have just explained I'm busy on another call, does not even apologize for not following instructions, then says she will call back at 10h00. Which she never did, dispite me being nice and send her an email advising if she is still going to call back being that it was 10h08. Then at 10h56 I receive a reply on my email, explaining she was in a meeting. Yeah write, and "***s are flying outside". Hope she enjoyed her Tea Break, cause it certainly takes higher priority then that of business and a high potential client. What an imbiscile.