Is reselling distributed internet service via a private subscription line to others permissible or forbidden, given that there is a condition in the contract prohibiting resale or sharing?

The contract concluded with the telecommunications company must be honored, and the agreed-upon condition of not involving others in the service must be adhered to. This is based on Allah Almighty's saying: "O you who have believed, fulfill [all] contracts," and "And fulfill [every] covenant. Indeed, the covenant will be questioned." It is also based on the Prophet's (peace be upon him) saying: "Muslims are bound by their conditions." Betrayal and breaking covenants are condemned. A custom that contravenes Islamic law is not considered valid. A Muslim must fear Allah and not transgress against people's rights and wealth unjustly.