@simrin-- I'm in the same situation as your friend. I think some spasms, aches and certain vitamin deficiencies do happen after hemicolectomies. But they should improve over time.
It's been six months since I had a left hemicolectomy surgery and my symptoms have been improving slowly. I do occasionally get spasms and I am getting treated for iron and B12 deficiency as well. But my doctor says I'm doing good and it will only get better after this.
If your friend's symptoms are not getting any better even after a year, maybe there could be a complication? I do know that there is a risk of bowel blockage after a hemicolectomy and I'm sure that there are other potential complications too.