Return hassles

I received a set of lug nuts from Carid 4 weeks ago and they are the wrong type of lug nuts as shown on their website. I requested an exchange or a refund and supplied them with pictures as they requested. When I call customer service they attempt to contact the supplier by phone but they never answer their phone or reply to the messages and the emails. Carid's position is I cannot get a credit or a refund until the supplier responds and sends a return mailing label. So if the supplier just continues to ignore their phone calls and emails that means I'm out $40 and have a set of lug nuts that I don't want? What the heck? I purchased the lug nuts from Carid so as far as I'm concerned they own this!! Just beware of purchasing from them as they are NOT customer friendly.