After a lot of thought, I opted to have my alterations done at the shop I bought my dress from, which is Victoria's Bridal in Williamsville.
I was debating using their alterations because they were so expensive (twice as much as quotes from other dress shops), but after weighing all my options, I decided because of the detail on my dress to stay with Victoria's because they know the designers they carry.
I went back last night for my third fitting and the bust on my dress is still too big! There are gaps between the dress and my bust, even after they took it in once, then added an additional set of cups to help fill out the dress, and she took in the sides.
After all this the seamstress pinned it a fourth time and I told her it was still loose and I wanted it tighter because I could see gaps, and she told me it looks good but if I am insecure I should buy double-sided tape!
At this point my wedding is two weeks away and I don't know if they are going to completely mess up the dress if they keep touching it, or if another seamstress would even be willing to touch my dress in fear of messing it up after this place has taken it in 3 times....