Game Store, I want my money back

I ordered pots online from Game Store at the end of June 2020. The website said it can take up to 10 working days before they can delivered and I was okay with that. After countless calls and emails, I finally got my package, a whole month later. They delivered the wrong nail clipper that I wanted for my son and the pots were not what I expected. So I went to the store and returned, got my money back instantly. Now a problem I have, well besides their horrible service, is that I was charged for a large delivery though the package was so small inside. I even asked their employee instore why I was charged for a large package and she said I should send an email. I sent an email and even attached pictures but no response. This was a month ago.