Wish has so many complaints, it's a wonder they're still in business. However, you need to be aware of and acknowledge the fact that what you purchase is not coming from a "Wish Store" out in California. Wish is like eBay, in which multiple sellers work through Wish, and most if not all of those sellers are located in China and Hong Kong-- hence the low prices.
It's not just Wish (technically, it's the sellers that are doing it) that has pulled that stunt before-- listing something as "free, just pay shipping" and then charging you much more than you were supposed to pay. Tons of websites scam people and do this and it's unfortunate and completely unfair, not to mention probably illegal. I myself purchased my second item in ~2 years from Wish in May 2017 and it still hasn't arrived. :/ Got a full refund, though. I'm really sorry this happened to you, but thanks for exposing this. You should list the seller/the link to the item, though! It's not Wish employees that are doing this, it's the Chinese merchants.