On the problem of contract machine

Hello! I also bought a contract machine and regretted it. I didn't understand it at that time, and the mobile phone seller didn't tell me. I bought it and went to the business hall for a detailed consultation. The machine card of the contract machine is inseparable. When you buy a mobile phone, your card is bound to the IMEI (identification code) of the mobile phone. Once the system detects the separation of the machine and the card, it is not aimed at your phone bill, but to pay liquidated damages, and you can't stop the machine within two years. I'm going to the business hall to apply for filing, which won't affect the satire fee. As for canceling the one-time guarantee fee, that is to say, the satirical fee can be used to offset part of the monthly rent, and I will regret buying the contract machine.