I'm sorry to hear that you're going through this situation. It can certainly be challenging when someone blocks you and refuses to return your belongings. Here are some steps you can consider taking to address this issue:

1. Give it some time: Emotions can be heightened immediately after a breakup or a disagreement. It may be beneficial to allow some time for both parties to cool down and gain a clearer perspective.

2. Communicate calmly: Once some time has passed, reach out to your ex-partner in a calm and respectful manner. Express your desire to retrieve your belongings and try to have an open conversation about it. It's important to remain composed and avoid escalating the situation further.

3. Seek a third-party mediator: If communication between the two of you is difficult, consider involving a neutral third party to intervene, such as a mutual friend or a family member. Their presence might help create a more constructive environment for resolving the issue.

4. Legal action: If your ex-partner continues to withhold your belongings despite your attempts to communicate, you may need to explore legal options. Consult with a lawyer to understand your rights and the appropriate actions to take.

5. Let it go: While it is understandable that you want your belongings back, sometimes it may be necessary to let go of certain items to prioritize your emotional well-being. Evaluate the importance of each item, as holding onto material possessions can sometimes weigh us down.

Remember, it's vital to prioritize your own well-being during this time. Surround yourself with supportive friends and family, and consider seeking professional help if the situation becomes emotionally overwhelming.