SUPERBALIST, I'M DISSAPOINTED!

I recently purchased a shoe on Superbalist around the 22nd of November. When it arrived I realised it did not fit me properly and I didn't like the make of the shoe when fitting it, and also the shoe got dirty the moment it touched the floor. The shoe was only worn for fitting purposes, I logged a return the following day after it arrived with the tag attached and everything it came with and they fetched and processed the return and sent me an email claiming that they will not take it back as it is "worn and dirty". The shoe was only worn for fitting purposes, I don't know if I was not supposed to fit it to see if it fits and I liked it because the shoe became dirty the moment I put my foot on the floor. I realised this so I stopped fitting it to avoid them accusing me of having worn it when returning it. They returned the shoe to me and now I'm stuck with a shoe that doesn't fit me and I don't really like it, I don't understand how I could've worn a shoe with the tag attached to it. I'm really disappointed in Superbalist I just need my money back and for them to take the shoe back, I'm more disappointed bcs this was first purchase on the app and this is my experience. I highly doubt I will be using it again. And again the shoe had a while sole so it got dirty the moment I put my foot on the floor, I don't know how I was supposed to avoid that!