Wedding dress help!!

My final dress had come into store for try on and collection. There was a huge black mark down the front of the dress so it was taken away by the boutique to be sorted. They said may need a new skirt or brand new dress. It’s now back in store and they have said it was only cleaned. I don’t know if this is wrong? Cause I feel unhappy about a brand new dress being dry cleaned, should I expect a new dress cause it was there mistake?