<human>: Tonight I drove over to my now ex-girlfriends apartment with the intent of collecting the few things I had at her place. One of the things I had left there was a router I purchased with my credit card, for me, since she did not own one. I gave her the option to either e-mail me the cost of the router, or I would take it with me along with the rest of my few possessions. She freaked out about it and said I couldn't take it and that she wouldn't pay me for it. So I unplugged it and that's where shit hit the fan. She pushed me down and was trying to grab it from my hands, scratching at me for it, etc. Regular stuff. At no point in this situation did I lay my hands on her. Eventually she called an ex of hers to come to her apartment to "help" and "have me removed" She started screaming and telling me to leave. Which I calmly said I would do, once I had my stuff together. (She did allow me into her apartment.) Eventually after much struggling to collect the router, and her ex on the way to her apartment I said I was going to phone the police, which I did. She threw my router into a bedroom and would not let me in the door. The woman on the phone (911) said it would be best to wait outside, so out I went. After giving my statement to the police they said I was not allowed to take my router, and that I would have to take her to civil court to try and get it back. But the other items I was allowed to take without an issue? This is where my question is. Why is the router considered a purchase for "the house" when I do not live there, and I purchased it? It is mine, but she has been allowed to keep it unless I try to take her to claim court for it? Is there another way besides that? 

Sorry if my post isn't written how they normally are in this subreddit. It's my first time visiting here.

Can you give me a shortened version of the text?
<bot>: police wouldn't let me collect an item even though it is mine, and told me if I want my stuff back I would have to go to civil court.