cbt?

i'm a beta or as you call it, a fag. No doubt about it. A Man mainly uses me for His chores, as sort of a domestic slave. He also makes me pay to do His chores. He also demands me to pay more if i do not do a good enough job at cleaning His place, which tends to be difficult, cause He always finds something and this is draining me financially. Another thing is He once kicked me in the balls and found that so funny, he does so regularly and sometimes even has me hurt my own balls for Him to laugh about. i do worry about this, like, it might hurt them? i also do not particularly like the pain myself, but He seems to love it and i once told him it was not a hard limit. He loves it ever since. But the pain is a lot sometimes. What should i do?