Help MIL AND SIL issue

Firstly, my SO’s WHOLE family came on the day of the birth uninvited after i told them that i don want them hours before the birth.

Took the baby not thinking that it should eat. They never wash their hands despite me telling them to do it before touching him.

I left the baby with them once and they let him play on the floor when they walk with shoes indoors and have pets that go in and out of the house. So the baby got a rash on his whole body and had to go to the doctors.

She constantly tells my SO what to do with the baby and goes against my will. She told him not to change him so he won’t spend money on diapers and the baby got a diaper rash.

They keep on coming to visit uninvited and just take the baby and dont give him back.

The MIL and my SO’s sister did not let us move away from them and cried for taking THEIR baby away from them because we moved out of their house. They kept on calling me an incubator and now that he is born they are so on him. Coming here every other day, constantly asking my partner for videos/ pictures of the baby.

I told them that i am not ok with posting pictures of the baby on facebook and especially with open eyes and his mum did it as soon as she could.

We took pictures of the baby and spend so much money and she took them and send them to everyone that has sent us a postcard. They would not appreciate the pictures as the baby is not even related to them.

She demands that her friends should hold him and let her MIL hold him despite that they hate her.

We had no money and no food and my MIL wanted from my partner to pay her back for money he has borrowed from her when she bought a hot tub.

She does not let me feed the baby formula as well even though it’s my decision as it’s my baby. I feel so pressured as i have feeding/ latching problems and cannot breastfeed him only express and half of the bottle is pure blood.

I don’t think this involvement is normal. They do not respect my wishes for changing, feeding, visiting and holding the baby.

His sister is mental wanting to have the baby as if it was hers. Texting him constantly, asking for pictures of everything every second, demanding to come over. She does not even talk with me just posses the baby just sits and stares at him from 5 cm distance, which really annoys me. Who needs such a close contact with a newborn??!?

I don’t know what to do apart from leaving my partner. I cannot put up with it.