The contract machine reserved by the mobile customer service manager didn't get the mobile phone, but received the business message. Can I cancel my subscription?

It's hard to say. Generally, a short message indicates that the business has been opened. SMS just tells you the specific tariff and effective time. As for unsubscribing from this service, I'm afraid it's not easy, because the outgoing caller of the mobile company has already handled this service by verifying the service password. You can try calling 10086, switching to the monitor or requesting a work order. I must emphasize that I didn't know the specific tariff and agreement at that time. I should be tough and ask for cancellation of business. If not, you can only complain.