Is the "someone" in your sentence receiving faxes in error and she wants those faxes to stop? Or is she picking up her telephone and hearing the high-pitched squeal which indicates someone is trying to send a fax? Are you someone in the middle of this faxing debacle?
I'd still like you to clarify the above but it's possible that you are looking for "Did you fax something/Have you been faxing things to 00-34-XXX-XXXX? I've received a call from a lady who says that that is not a fax number, it's a telephone number, so she would be grateful if you would stop trying to send faxes to it."
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