Got Into Bad Argument with my roommates

Pata hai aaj kya hua,

So I live here in Delhi with my brother and two other roommates who are from my college only, but they're morons, there are two rooms in the flat one big one relatively smaller, both of them live in the bigger room.

Everything is shared from kitchen things to rent and everything, so in November one of my roommates cousin came to live for 3-4 months (he's still here only), so I was like tell him that he will have to pay rent as he will live for long time, and they agreed and he's paying rent and living in the till now and I think he will keep on living here only.

A month ago my roommates elder brother came and since a month he's here, he's in his room so I was okay with it as long as they don't try to invade my space.

Today what happened that we had to get cylinder refilled and I asked them to divide the cost of cylinder refilling in 6 people because, his brother is living here for a month and I am sure he's gonna live longer, so my roomate started arguing with me that we share flat and I should pay half of the rent because I live with my brother in a separate room, and it doesn't matter how many people they keep in their room and told me you can also keep more people in your room (I clearly don't want to).

Both of my roommates are so fucking moron, they're the type of guys who like to stay in one another's ass, I am not like that i need my space and I don't like unnecessary arguments and problems.

He started to tell me that i will have to pay half of the rent, and I got so frustrated I told him that i will leave flat so he should somehow arrange my security money, otherwise I am gonna talk to owner for the security (it will surely lead to them getting kicked out of flat as well), I am the one who's the one who manages contact with the flat owner, they're retards can't even hold the Convo with the owner.