Unable to defend yourself against verbal attacks and criticism? Very angry, and beginning to doubt yourself

When the deposit was returned at the end of the lease, I mentioned to the agent on WeChat that the process of returning the deposit was so complicated and troublesome, since the process of collecting the deposit when renting the apartment was so simple. The agent immediately called and said that this was the process, set by the company, and that I had no reason to complain to him. The agent's attitude and tone were very bad, and I was angry on the spot, but I wouldn't argue back. I just roughly said my problem. You can report it to the company. Why are you scolding me? He said he would not report it to the company. Later, when the deposit was returned, the property fees that had already been incurred were deducted. I mentioned the incident of overpaying the property fees when I first moved in, and I did not intend to get them back, but the agent immediately started verbally attacking me, first saying that I was bad at math, and then saying that I was a girl and that he had already considered me in every way. I also dug up the old accounts and criticized my work ability. It is very unlucky to have a customer like me. I haven't argued back yet. Liu blocked me on WeChat. What he emphasized to me was that he had been kind, but I was being stubborn. At first, I thought I had misunderstood him and felt apologetic, but after the deposit was returned, what he said