Car seats

[mumsworld33]

Don't know what to do.
I have told my ex to provide children with car seats since we split and gave him until last week to get his own as I have been asking and asking.
In the end I give him one car seat so he only had to buy one but found out he didn't even use my car seat but instead used a booster seat and my son is a small 3 year old and put our 15month old in a baby carrier car seat!
What do I do?
I know these car seats are unsafe for them and don't want him turning up again for them with the wrong seats.
Our relationship is awful, if I say it is white he will stand his ground it is black.
Who can I contact regarding car seats and him using the wrong ones?

Sorry didn't say reason as to why I told him to get his own.
Basically so I don't have to spend as much time with him while swapping car seats over and he will happily allow the children to eat/drink in them and he doesn't take care of them so always needs washing.
Many occasions he has left them outside of my car(when unlocked) in the pouring down rain or just to be awkward.

He sounds like an absolute nightmare but there is not a chance in hell I would be letting anyone drive away with DS in an unsuitable car seat.

Oh, with regards who to contact, technically it's a criminal offence but I don't imagine the police will actually do much.

I have no idea to be honest. - hopefully someone more knowledgeable will be around soon.

It sounds like the most important thing is your children's safety - surely that's more important than some crumbs? It takes minutes to transfer seats over.
Is this a reverse?

It does take minutes to change them over and I will if they will be in the incorrect ones again.
I asked him to get his own and I gave him one so it wasn't so much for him to buy 2 but that wasn't good enough and then found out he didn't use it but put it in his boot and used the incorrect one and borrowed another.
I don't know who I can talk to regarding this.
If I say something I always get abuse thrown back at me no matter what I say.

The infant car seat isn't necessarily unsafe if your 15mo is under 13kg and his/her head isn't at the top of the seat.

I wouldn't allow a 3 year old to be driven in a booster though, particularly if he's under 15kg as that's illegal.

Not sure who can help other than the police as it's their job to enforce car seat laws? Maybe ask a Community support officer for advice? Sounds like a really tricky situation.

Thank you.
I have spoke to Halfords and they have said both car seats are incorrect for them with the weights.
Just need to let him know now and just wait for the backlash I will have.
I thought I was being reasonable by providing one but that has annoyed me more as he had a correct one and chose not to use it.