By using a VPN, you can change your actual IP address to one that can access bet365. VPNs redirect your internet traffic through a private server, so it seems like you're in that country. For example, connecting to a UK server will provide you with a UK IP address.
bet365 is legal in many European countries (including the UK, Germany, etc), the US (only in New Jersey, Colorado, Ohio, Virginia, Kentucky, and Iowa), Canada, a lot of Asian countries (Japan, Thailand, Singapore, etc.), and Brazil. Select a server in your home country and connect.