Some clothers, my phone charger and brand new boxed Ikea furniture worth £160.
Is there anything you
need? Is there anything you
can't afford to replace? Is there anything of major sentimental value?
If the answer to those questions is "no", then tell her she can keep the stuff and be done with it. It's cheaper to walk away and stay away.
If the answer to any of those questions is "yes", then ask a woman you know if she would get it for you unless you think she'd be at risk of being attacked by your ex. If you think that, seek legal advice.
You are placing yourself at risk by going there. You could suffer serious, lasting harm as a result. It isn't worth doing so. It wouldn't be worth doing so for anything - even if there was something of enormous value to you it would still be better to have someone else fetch it.
There is no sensible reason for you to go back there, none at all. If the stuff isn't of great value to you, write it off. If it is, get someone else to get it for you. A woman if you're doing it informally, an official if you're going through the court system and doing it formally. But not you. At best, you'll have stress and drama and leave empty-handed anyway. At worst, your life will be severely damaged. There is no upside to going there yourself.
It doesn't even matter if you're telling us the whole story, a biased view of the story or a pack of lies. It doesn't matter if she's a nutter or you are or neither of you are. Who's at fault and who isn't or the extent to which either of you are at fault has no bearing on the best course of action, which is for you to not go there again.