How to get court to press theft charges

I have been dealing with an abusive ex and today I was granted a temporary domestic abuse restraining order. The other day, he used my debit card to make a $20 Amazon purchase without my knowledge or consent. I had Amazon send me a confirmation letter that he made a purchase with my card number and I notified police. Today, the police said my ex will pay me back and therefore they won’t be pressing charges. The police also said since it was only $20 there wasn’t anything they were going to do. What do I do? The court date is in 2 weeks, do I bring it up then? I want him to be charged for this, because it adds to my case of much more serious things. Is this not theft?