For your personal safety, never display your address or phone number on any open site on the internet.
It is pretty safe to post your email address because it is hard to fimd your home from it.
You should erase your info by going back to that post andbclicking on a button that says "edit". That way you can go to what you have posted and erase the info.
ECS is a retailer, just like a "brick and mortar" shop and as such, do not stock extra floss from kits sold.
I am not an ECS employee, just a stitcher in this chat group. I have many friends here and know of no one who would hurt anyone. However, we don't know if people with bad intentions troll here.
Just be cautious.