Loud neighbor

Hello,

My husband and I have been living in our apartment for about 18 months now, and we have an extremely loud neighbor. He turns his radio on so loud that we cannot even have phone conversations in our apartment. The noise has been getting worse and worse the past few months, so we sent him a very nice letter asking him to please just turn the radio down a bit in the morning. I was hesitant to send him a letter because I was so fearful that it was not going to help and it would make the situation worse. Unfortuantely, it did.

He did turn his radio down for about 2 days, but the past week, it has been even louder than it was before. The neighbor taped his business card to our door, so this morning, when my husband was already at work, I asked him to please call our neighbor and ask him to kindly turn the volume down just a bit. I knew the minute my husband called because the radio was immediately turned off. However, my neighbor told my husband he didn't know what he was talking about and that his radio had never been on this morning. I assure you, it was his radio and we were both frustrated he blatantly lied to us. 

This afternoon, I decided to be the better person, so I went and purchased a nice, big box of chocolates for him (€30!) and knocked on his door. I introduced myself and said I was sorry for any confusion, but could he please just turn down his radio slightly in the morning. He then proceeded to yell at me and tell me that he has lived in his apartment for 7 years and that he did not have to change his lifestyle for us. He said "this is how I live and I am not changing. Nobody else in the building cares about my radio." His apartment smelled strongly of marijuana, and he was extremely confrontational. 

So, what do I do now? If we call the police, will they come listen to the noise from our apartment? Is there anything we can do? We had REALLY hoped to avoid this situation and thought a nice note and being extraordinarily kind about the situation would help, but it just seemed to make him more angry. Please, any advice would be much appreciated....and please only real advice. We are not going to be loud in our apartment because we don't want to disturb any other neighbors. I would appreciate any legitimate advice or to hear from people who have been in this situation in Brussels.

Thank you!!!