If I refuse to serve you (eg in a shop when you want to buy a snack) because I think you are foul I don't get to take your money /then/ tell you while putting your money in my pocket. If I decide to withhold part of my service (eg stop mowing your lawn and leave because you are foul) I don't get to keep all the money for completing the job. This stuff isn't hard. Think about what it is in life when there is no "cpu attached to a network" as a necessary part of the transaction. It's the same.
Taking your money for no product delivery, charging you fees for no service is theft even if you are completely foul. Pointing to a "condition of entry" sign at the door of your premises does NOT change the law.
Taking your money for no product delivery, charging you fees for no service is theft even if you are completely foul. Pointing to a "condition of entry" sign at the door of your premises does NOT change the law.