Was I Wrong???

So a few weeks ago with my daughters birthday my sister call to ask me for her shoe size, I told her no shoes because she really had to many already, she won’t be able to use them all. That’s all I said the day of the party my sister did not go because she said I did not tell her in time about the birthday party and she was not gonna go. she called again to ask what size of shoes so I told her once again no shoes but I told her the size she end up buying her something else after all. A few days go by I try to tell her thank you but I see tha am block. I left this morning to eat with my mom…. My mom Call her to go eat she said that she wasn’t in good terms with me because I was an a?€% for telling her not to buy my daughter shoes that I should be grateful for whatever they get for my daughter and that I was mean to her . So I show my mom the messages between me and her my mom said, I never was disrespectful to her. A few minutes later my sister called back insulting me calling me many many names telling me that I’m not allowed to be in her sons life I won’t be invited to my nephews birthday parties etc after my mom Click I really really felt bad I started crying because I don’t think I was wrong to tell her not to buy her shoes and even if I was wrong I think she’s taking it too far, to the point to say that I’m not allowed to be in my nephew life no more ..