Letgo review: folding black table/blue chair

My husband and I have been mislead several times by this seller that goes by "Sell 101". She puts items on LetGo but also sells items on the weekends at a "Shopping Mall" at 168 East 2nd Street in Derry, Pennsylvania. We don't know her name, (an old woman with long gray hair). She NEVER answers any inquiries (though they are marked as "read"), and posts misleading ads for items that are wrongly described or already sold (but doesn't delete them). She lists items for multiple sellers. The phone # of this "flea market" is (724) 552-6711. Please look into this matter. Thank you! L & D / Derry, PA.