Wedding dress disaster

I ordered my wedding gown in November of 2018. I was told it would come in after 3-4 months which was totally fine since our wedding is not until February of 2020. After hearing nothing from the shop since I ordered the dress I decided to call last Friday (May 17) and received an email back today with not good news. I was told that she received my dress 2 weeks ago but instead of the size 6 she ordered, they had sent a size 2. She said she immediately sent it back and inquired about a new one but they replied that that was not possible as the dress had been discontinued in March. I was given 2 options from her: she can try and make the dress or she will give me 50% off any dress in the shop and use the $1100 I already spent towards that. I called the shop with no answer and also emailed back asking that she call me as I was not going to deal with this over email. I have yet to hear back but I no longer trust this shop to provide me my dream dress. The dress was my dream dress and I looked through her entire inventory online and found nothing that compared in my eyes. I would really rather just take my money elsewhere, however I fear she won't give it back. I am just not sure what to do and completely upset that I will not get the dream dress I had been expecting for nearly 7 months.