This happens most frequently with advertizing which can be temporary...  and can expire without notice.  I think the old CL ads stayed up for longer.  The new ones, I'm told, expire quicker.   Very seldom does a provider's web site go off line...  unless they retire or something.  
I would suggest you go to where ever you found her & search by name.  Try a search by phone number.  Maybe part of her email address.
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