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Hi, thank you for contacting JustAnswer.com. My name is Russell. I suspect that it is too late to help you with this case, but I'd like to try nonetheless.
If you wanted a service call scheduled for the 18th February to be canceled, it is too late to do so. But the usual thing to do about cancelling a scheduled service call, is to contact the Customer Service department of the company contracting to do the service call.
Let me know if there's anything else to straighten out or do about this matter. Thanks.