Complaint Against a Service United States / promo code

I got on the website a received a promo code “love” for up to 50% off (up to $100 is what it said). Placed several items in my cart that were in my wishlist, with a total of about $74 and $37 in shipping fees, I then added the promo code and it took off $3.70??? That is not 50% off anything, not even one of the items. It took $3 off of an item that was $32. I have a photo of the promo that states “up to 50% off $100 maximum discount” and I get 5% off? How misleading! Especially when i’ve paid shipping costs that are double the cost of items. Very disappointed. Customer Service
One Sansome Street, 40th Fl
San Francisco, CA
United States – 94104
+1 800 266 0172