LONG but need some serious advice on a dead beat dad

so my daughters father just recently came to visit her, we live 18 hours apart. (He has history of drug abuse and selling drugs) He brings a friend with him.. which is fine but it was the friend he brought .. said friend is in and out of jail, has no contact with his own son and also has history of drug abuse... ive known him for a few years and i just dont like the guy because he is an idiot. My daughter is beyond excited to see her dad and she cant wait to spend the night at the hotel with him .. so i drop her off for an hour to see how things go before her dance recital (her dad has never done anything to put her in danger previous to this) i pick her about 45 mins later and ask her how it was and if she was okay being around daddies friend and she said yes shes also known him basically her whole life ( also these two boys together have always been trouble, they do drugs and sell drugs together, so when they are together everyone has suspicions) so after her dance recital i drop her off for her sleep over, her dad pulls out a stack of cash and hands me 500$ to help with christmas which he said he would before he came here but like cash is a warning sign for me especially large amounts with him... anyways the night goes on i end up in preterm labour in the hospital spend the night there get discharged at 10am, they fell asleep at 10:30 that night and he didnt wake up until 12:30 pm i know for a fact my daughter doesnt sleep past 10 am no matter what, so im starting to worry, didnt sleep all night in the hospital and couldnt do anything all day cause i just had a gut feelingbut i thought he is her daddy he would protect her like he always said, finally at 8:30 pm i pick her up, she looks so sad and relieved to see me shes literally trying to leave asap without any of her stuff, she barely says bye to him. we get in the car and i ask how her visit was.. she flat out told me daddy left her alone to watch cartoons while daddy and this friend were in the bathroom for a long time.. which sparked fire in me anyones who has done drugs or been with a drug addict knows the bathroom is where it happens so now im livid that he would do drugs with his 4 year old daughter there, the reason why i know he is doing drugs is because i can see it when i look at him, i was super suspicious but what she told me confirms it. so thats issue number one THEN she tells me while daddy was sleeping till 12:30 daddies friend asked her if she wanted a bath or a shower, she said bath so he ran her a bath grabbed her a towel and then left amd closed the door.. yes im thankful he didnt bath her but why tf did he offer and what if she fell or drowned? anyways i confronted him about it and he fed me tons of lies and tried getting me to take her back to the hotel room so he can question her like no fuck that im not making this pooor little sad girl go back and have to pick sides she already told me she wanted to call me to come home but she didnt want daddy to think she didnt miss him, and i will never question what she told me she has no reason to make this shit up and he lies about everything.. so my question.. im ceasing all contact with him .. hes not on the birth certificate and has no rights i feel he is a danger to her and i will never allow this to happen every again .. but what do i tell her when she asks to call him? im at a loss