Poor Online Customer Service

I ordered a pair of shoes online and unfortunately the style and cut of the shoe didn't fit my foot. Therefore I needed to return them only to find that it's proving quite impossible to do so! The app doest allow the return to be logged and processed. After about a month and continuous calls to Adidas customer service I still have the shoes! All these guys keep telling me is that they are working on the problem!? The fact that, as a customer of Adidas, I can't do more than just wait for someone to eventually assist me is crazy! Im not impressed at all!