Confusing Website and Business Practices - S522)

I went to the SA, website and it redirected me the UK site. There they list some of the shoe sizes in UK sizes, as indicated by the "UK" in front of the number. On some shoes, however specifically the ones I bought, the sizes were not preceded by the letters "UK", which in my mind meant they were US sizes. FOM is an international company so why think otherwise? I just want to say that I don’t think that I have an ******** US POV where I just think that everything should cater to Americans, in fact while I live in the US, I was raised in Canada and love supporting multicultural everything, including this South African Company! I also know how to convert sizes from UK/EU to whatever. The problem here is that the information on their site is confusing... Anyway I asked FOM UK to pay for the shipping back, but they have said this is not their fault and refuse to do so.