Wish complaint: Won the item for bring the first person to buy it.

I bought few items on wish for their do call if you’re the first buyer u win the item that u bought or they’ll refund your money back. I won this 3 speed electronic bike and it says that the item is at their store waiting to be shipped out but they keep sending me emails that they don’t have the item no more and for me to choose one if their other items to replace the item I’ve purchased. Every item they recommended me picking was nothing close or not even a quarter of the cost of the item I won. All I want is what I won and now they don’t wanna send me my item and try to say it’s out of stock. Isn’t that illegal plus false advertisement? There’s slit of false advertisement at this websitestore and I’ve been trying to file complaints but all u get is the robot bullshit that don’t answer none of what u need help on. I think it’s just there to make buyers give up on refunds and complaints about the sellers. This needs to stop