Help me save her….

This was a peace lily my sister who lives out of state sent to our grandpas funeral recently. I have it at my office and I was off a few days last week due to my daughter having surgery. I’m not sure what happened but I really would love to keep this plant alive. I had an extra grow light at home I wasn’t using on my succulents. I did take her home yesterday and repotted, the roots really looked bound up.