Should the remaining amount be paid to the driver or the company after ordering a car through an app and choosing a wrong destination, then agreeing upon a lesser amount for the distance traveled?

If your friend made a mistake by giving the driver a wrong address, she must pay the fare for the extra distance the driver traveled, as it is additional work for which he incurred damage. This can be supported by the statements of jurists regarding a tenant exceeding the agreed-upon limit in a lease. As for you, you are not obligated to pay any of this compensation unless the request was made in your name, in which case you pay the company and then seek reimbursement from your friend. If you negotiate with the company and it accepts an amount less than what it is owed, there is no sin. There is no sin upon you if the company knew what happened and waived the excess amount; otherwise, you are obligated to pay the fare for the extra distance to the company.