facebook help

Big facebook problem! or glitch? Help please:)?
guys a friend of mine cannot delete a post she did on some page like 3 years ago! she and i try to delete it but its not working!! When we try to delete it it says
''The content you requested cannot be displayed right now. It may be temporarily unavailable, the link you clicked on may have expired, or you may not have permission to view this page.''
IT was done in 2011
Please guys its urgent to delete it! help neeeded desperately! and we tried contacting facebook but no help guys If u have anyyy wayyy just tell me its very urgent we do it! Thanks
if u have any email of facebook or any way to contact facebook! tried everything so phones was a big no no they kept us waiting for soo long! help a mate out here guys! would be very gratefull!