Website dispute

My brother is a website developer. He made 2 websites for 2 people one being a tour guide and another being a musician. He charged both 160$ and 60$ respectively based on their criteria. He started making the site even before taking the money from them. Now in between he needed around 260$ so he asked for debt from the tour guide and promised to pay back. He also mentioned to mamage it with the website making charges amd pay the rest back. Now recently the tour guide said my brother charged him too much and asked jis money back. My brother sent him 100$ as he promised earlier. The tour guide also told the musician that my brother is a fraud. And the musician too asks for the money back. He paid 60$ to my brother regarding 2 sites of his 2 bands. My brother transferred the sites to him and they took away my brother's access to their sites. They r mentally abusing and pressurising my brother everyday and threatening to go to the police and defame him. He has fallen ill due to the mental stress