I bought a second hand dress. It is a shift sleeveless dress, square neckline with a flat ruffle detail along it, wide straps that are round and go on top of the shoulders. The material is wool +polyester, it has a zipper at the back and lining.
I took it to the seamstress, for the usual alterations, I am an inverted triangle petite. Dress length was shortened and straps too to fit my short torso.
Now, I tried the dress again and I can see that neckline is still a bit low. I won´t take it to the seamstress again (I spend enough in a not too expensive dress!). I was tempted to give the dress away, I was a bit discouraged. I have lots of issues with the fit of dresses. But I thought I will try something before.

I thought of shortening the straps more but then the armholes will be too tight. The issue is probably that the dress is a medium size, to fit my wide back and shoulders but I am only a cup A. So I was thinking maybe I can add more fabric to the neckline adding to the ruffle?
This are pictures of the actual dress.


Has somebody any tips or ideas how to fix this issue so it is not too noticeable?
I am adding a picture to give an idea of the dress shape. I will upload my dress pix later.
Thanks!