Im returning it. I loved it. But maybe I just need a different style

I bought this dress in size Small 5” 137# I am usually size S in dresses It fit good on the body , but when you try to close it in the back it is super hard you will need some to help you :( and it did fit me right now I need to take it somewhere to get fix and do a add on something in the upper back. I wasn’t able to return it so difficult to get fashion nova to do a return :( not happy at all with this purchase