The Paradise Grove Square Neck Neck Swim Dress

I am so glad that I found Beyond Control Swimwear! I was so frustrated with other swimsuits I have tried on this year. They didn’t have truly supportive bras and I need support. This swimsuit has great support and is very flattering! Thank you!!

It doesn't fit and I want to return it but because it was on sale, apparently it is not returnable. I would not have bought it if I knew I couldn't return it. It was quite expensive even on sale so I am very disappointed that I cannot return it. Please explain why I cannot return this bathing suit which I have only tried on once.