Vanessa. The black spots on the stems could be normal, it's hard to say without a sharper close-up. It looks as though the plant may be indoors? What I wonder most is what potting mix it is growing in, it looks an unusual colour, possibly rather dense, and the potting mix comes almost to the top of the pot. Do you know if it came from a garden centre or other retailer, or did someone dig it up and repot it? It doesn't look to me as though it was done "professionally" because the pot is so full. I'm guessing the flowers were either blue or pink? Depending how often you watered it and where it is located it could be over-watered but not all the plant is wilting which makes me wonder if it's not that. If you can tell us a bit more about its history it should help.