Seamstress can’t bustle my dress

So my wedding is in 12 days and I finally get my dress back from the seamstress (one of my mothers friends) and the bustle still isn’t right and will not hold the train off of the floor at all. I am out of time to find someone else to bustle my dress and I don’t know what to do now. I’m wondering if buying a second reception dress might be my only option at this point. I’m so frustrated that I didn’t go with someone else for my alterations but my mother insisted on using her friend since she paid for the dress. I told my mother that I may buy another dress and she is livid. She insists she will bring safety pins and will pin it up herself after the ceremony.