OfferUp - www.offerup.com

I'm a business owner I sell furniture n mattresses part-time, that's y I use offerup.com to sell my products. However, the staff is very corrupt when I list my ad on their site the tech support team will go back n reedit my information saying my product is SOLD. The offerup.com is stopping from selling. They also change my zip code to confuse consumer. Is that shady or what? Another thing very hard to contact consumer service by calling or emailing them. They just suck! I'm putting this out there because I don't want anyone to go through this like I have.