Sister kicked me out of her wedding?

Anonymous
Next month I was supposed to be the maid of honor for my sis' wedding. Anyway yesterday she organized to go shoe shopping for the wedding. I cancelled plans and agreed to go with her. Today she calls up and cancels (something she does frequently). She told me to give her my bank details and she would put money in and to get what ever. It kind of annoyed me that she always cancels plans so I text her and said to not worry that I would pay for the shoes. She then angrily writes to me and my other sis (who is a bridesmaid as well) that she doesn't want us to be her bridesmaid anymore, She blew things way out of proportion so I told her that in that case I wasn't going to her wedding and she said, "fine by me." So I was like "good stuff" and then she's like, "you'll never hear from me again." I responded with "Take care". I know she meant what she said, I just feel kind of upset that she would act that way. Did I do wrong by saying I would pay for the shoes?
Updates
+1 y
My sister is 25 by the way and lives 2 hours away with her boyfriend, so it's not like we live together to sort things out.
Updates
+1 y
Hey guys I have updated my question in this link, if you's like to read link
Sister kicked me out of her wedding?
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