and strongly demand to cancel the insurance

Just say that if you don't cancel it, even your credit card will be cancelled together

The insurance for telephone sales has a recording and a 15-day hesitation period, that is, 15 days after you receive the receipt of the contract, and the money deducted at any time during this period will be refunded to you. If it is deducted, it will usually be deducted 3 to 4 days after you handle it. According to the regulations of the insurance industry, it should be refunded. Including the cancellation method, these should be clearly told to you when selling to you, and reflected in the telephone recording. You can call them to give you the recording. If you cancel, you can directly call the customer service hotline of their credit card and report your name. You should be able to find the staff who will help you with insurance.