Interior Designer incomplete work

I hired a interior designer for my 2bhk flat & she committed with 2 months time period, with 9 lakhs of total budget on stamp paper with all the details mentioned on it by her itself. But, she not even completed it on time(5 months) also the things which we asked for are not there as all the lights points are not as asked, laminates are faulty, some lights are not working, some of things she committed are still pending, and now she is asking for the payment to do so. if not then she swill not do anything. & for this she took 5 months. as per her she completed this work in feb 2022 & still alot of things she needs to do. She failed in each department of work- 1st plumber left work in between, electrician took whole amount and ran, painter did whole work as the color started coming of in 2 months, carpenter left most of the things pending like finishing the edges which had cut on our guests and ourselves also. we paid whole amount in trust and she is now acting like i need more amount to settle. Let me know how can i sue her legally?