COPY - Poshmark overcharged me shipping on 18 items totaling nearly $100!

I won a prize of discounted shipping for a listing streak! I bought 18 items and the “prize” of discounted shipping was never applied to 1 item! I even bought from buyers who put discounted shipping on their items only for me to buy and still be charged full shipping price! I have addressed poshmark with no response although I have screenshots of every purchase to prove that I’m owed cash back or credit in the very least! I’m not even counting the non discount on shipping for items I bought before the holidays or before winning any prizes for listing streaks. I will not buy, sell or list anything until this is resolved as I feel completely ripped off and lied to! $3 & $4.99 shipping is a big difference from the overcharging normal shipping gouging of $7.95 (especially considering it’s not just 1 item but 18!!) I guess getting deceived with promises of discounts was my prize and my holiday gift 🤷‍♀️ nearly $100 in shipping charges!