What can I do

My partner and his brothers moved to an apartment without knowing the apartment was infested with bed bugs so once they found out they asked the landlord to fix it but he never wanted to fix it. I had gotten kicked out of my moms house because of my sisters fault so I went to go live with him and his brothers. I started to notice that my son had marks from bites and I would also feel something on my skin as well and I went to tell the landlord if he can fumigate but he never did. I brought in my dog without knowing no dogs allowed and he told me to remove him or else he won’t fix nothing from the apartment but he never did nothing when his brothers asked him to fix the apartment he never did but yet he told me to remove him or else he will have to remove us from the apartment so I tooked the hard decision to remove my dog which I have had since he was a puppy and he has been with me in my hard times I did hi so much every morning that I come from work is so sad to open my room door and not see him there running towards me I don’t know what to do