VERY POOR SERVICE FROM ZANDO

I'm so disappointed with the service I received from Zando, I ordered a shoe on the 27-02-2020 and the shoe was then delivered on the 04-03-2020 it was big on the person I ordered it for and it was picked up the next day 05-03-2020 and I received an email on the 06-03-2020 saying that the shoe is now in their warehouse for a quality check and until the 18-03-2020 I didn't hear any word from them and when they finally came back to me they said that the shoe is dirty and they sent me pictures showing that. When we sent the shoe back it was clean and they kept the shoe for 8 working days. How can I be sure that the shoe was only taken out of the box upon inspection? because there is NO way that a shoe can get dirty without being worn and now my return has been rejected. I wouldn't have returned the shoe if it was not in a condition to be re sold? !!!!! I'm going to spread the word and post on ALL platforms about this ridiculous service that I'm getting from ZANDO