Don't order online!

I ordered a windbreaker and a fleece on 18 April. On 24 April, 2 pairs of cycling shorts showed up as my order. I left the shorts at the Pargo pickup point and got in touch with Decathlon to let them know they sent the wrong thing. I was assured the correct package would be sent and would be there in a few days. TWO WEEKS LATER, I don't have my package, and they've stopped responding. I sent a refund request email, and a bot responded with a link to "return or exchange the item." What item must I return or exchange?? I NEVER GOT MY ORDER. Along the way, the support agent forwarded me an email to Pargo saying, "The customer is complaining," to show me it was Pargo's fault. As the customer, I don't care whose fault it is; I just want what I ordered. When it's your brand I order from, it is on you to fix the problem.