For rental bicycles that allow users to borrow bicycles from automated bicycle parking areas (cycle ports) set up throughout the city and return them to any cycle port, users must return the bicycles properly in the manner specified in advance. If you continue to be charged even though you have returned a bicycle, there is a possibility that the bicycle has not been returned properly, so you should contact the service providers and explain the situation to them. If you can't get through to the service providers by phone, contact them by email and record the date, time, and details of your inquiry. If you can use an app to check whether or not your bicycle has been returned, be sure to check before you leave the cycle port. If for some reason you are unable to return the bicycle by the designated method, contact the operators immediately.