Call centre agents sighing at me

I was on the call with an agent from SARS asking for assistance to continue my e-filling as it is my first time. He was first of all very impatient with me when I kept asking him a lot of questions, then I heard him sigh in the background. I even told him that he is rude to me and he continue to ask me to keep quiet while he helps me. I have posted this on my social networks and would like people to to know what type of agents work there. Rude and impatient.