No beds, no bedding and no toys is a massive red flag. Add in dirty house, drug use, hitting of children and limited food then yes, phone.
I had ss involvement due to DV and the social worker came round to my home and spoke to me.
She asked me if my kids did any activities (yes they did) and had spoken to the dc school to check on a) attendance levels and b) behaviour/acheivement.
She looked round my home (clean and tidy) and checked the dc room (bunk beds, full of toys and kids stuff, clean and tidy) and said that there was absolutely nothing to worry about and left.
So yes, bedding, toys, kids having a social life, clean and tidy home, food in the house. All these things are important and it seems to me that your dbs children are severely neglected.
The poster above says her child prefer to sleep on the mattress on the floor with no bedding because of sensory issues but that's rare and quite different to the things you are saying. Please do report them to ss so they can intervene and improve the childrens lives.