My ex LTR and I go to the same university, she is a Sophomore and I am a Senior. We broke up at the start of summer and have gone 2 month no contact. I deleted her from snapchat (only social media I use) and she replied by blocking my cellphone number. The problem relies that she has in her apartment all my stuff and didn't want to give it to two friends of mine that contact her a couple of times to pick up my stuff during the summer. I used a friends Intagram to DM her.

ME- I am going to pickup my stuff the coming Wednesday.

SHE- I wont be available Wednesday. I will text you when you can come for your things.

ME- Don't worry, I have a key of your apartment.

SHE- You are not aloud to come into my apartment.

Its ironical that for winter break I let her use my apartment to store things and let her pick them up without me being there. I want to get my stuff as soon as possible and want to start a fresh semester not having bad vibes from a failed relationship. She turned out to be a pretty low value women and has been talking shit about me to people. How should I proceed, I really feel that if I go as soon as she tells me I will be operating in her frame. Also, I want to make her know in a subtle way she is a piece of shit for kidnapping my stuff.