NY Collection Petite Halter Front Chiffon Maxi Dress

I like the dress so much but the problem is when the time that i will use it (in my cousin's wedding), I'm having trouble with the zipper. It was really hard to zip and when I ask my sister in law to help me, it go through but after a while the zipper broke. Im so frustrated because with that incidents I'm almost late in the ceremony :(

Dress was way too small. Wouldn't fit a child much less an adult. And I ordered an XL even though I usually wear a large.