Bridemaid vent/understanding

So our wedding is soon and I am thankful to the bridal party for being part of our special day but sometimes it seems like this is there day or they don’t have us in mind but mostly what bothers me is the unpreparedness. I have one bridemaid who is great she gets everything on time responds to messages ect but some of the other girls are the opposite. I even explained how important it is to be on time/track and can you do this on your own without me following up since I have other urgent matters that need my attention her (bridesmaids A) response was yes and but it’s not happening. So for some context I gave the info for the shoes to order they are to wear for the wedding day. No issues until one of my bridesmaids said the shoe didn’t fit bridesmaids B (style) so ok not a problem I found another shoe (it was actually okay because also another one of my bridesmaids her shoes never came so that’s 2 bridesmaids {bridesmaids B &C}that need the new style show out of 5). I found out bridemaids A shoes never came in I had to remind her several times to call find where they are which was fine I understand people have busy lives I’ll help remind you no issue and we had more time at that point. So she calls they were delivered to the wrong place. She said they told her they would give her a refund and she can reorder them in my mind I though they should have just sent her out some new shoes even though it was no fault of hers or there’s it was the post office. So bridesmaid A says once they give me the refund I’m going to order the shoes I say okay make sure they are in stock and also check in the store to see if they have it if they don’t you have that second option shoe I sent to Bridesmaids B and C. Cool we are on the same page because again she told me she would be fine to handle it and I can go work on other wedding stuff. My FH reminded me did I follow up with her on the shoes and I said let me just see if they came. This conversation to reorder the shoes was the end of April this morning she tells me she hasn’t ordered the shoes yet and that the shoe is now out of stock in her size (which is why I asked her to order it right then and there when they were in stock). Plus now she says the 2nd shoe option isn’t going to work for her. What!?!? Why do you wait to tell me this now and I have to go and find a 3rd shoe option just for you. Why can’t people communicate and communicate on time. It was difficult to find the second shoe option. So at this point I’m just going to find a shoe and order it for her. Did anyone have issues with there MOH/bridesmaids how did you get it to be clear we are on a strict timeframe and we need everyone to be in order or at least communicate?