I need some help please

I know this is totally not for this type of thing but my roommate owes me over 400 dollars in unpaid rent and electric bills and I have been covering it so we have a place to live and electric on in the house and now its time to pay rent again and she isn't responding to my texts. She never is at the house but her stuff is still in the house and her name is both on the electric and on the lease and I am keeping a log of my own and I do plan on talking to my landlord about this the next time I see him but even he is kinda shady and comes on the first day of the month and demands rent without giving us any notice that he is coming and hasn't even given us the copy of our lease and keeps making up rules that are not on it. I need some help this is the first time actually renting and its totally going wrong