Well, I’ve did that and contacted them though FB Messenger to no avail.
I'm not seeing any cases opened from your account since February 18th. Try the above link again if you can!
I’m curious if you were ever able to contact offerup? I have tried many times and absolutely nothing seems to work. Every link that’s posted goes to nowhere. If you managed to find any way at all to get any kind of assistance with your issue, I would sure like to know the secret! And I’m guessing a whole lot of other folks too!
The hyperlink indicated as "this link", posted by the forum mod (just above your post) is the customer support link.
You can also contact customer service via OU's Twitter account. There is no "live"/real-time support/ph# available.