I want to File a case on nestaway company as anyone else was living in the flat and i was paying

I sent this email and they haven't replied on it from a month now, what should i do. Hi Nestaway, i am a tenant of N10961 who is moving of 11th jan 2021 till this date j have paid my all rents and I'm ready to move out as per my schedule date. I want you to let you know that i was not in the town from 11th may 2020 as I went to my hometown and was paying my tent on time. I came back on 10th jan 2021 in the morning and found that some girls were staying in my flat and totally occupied it. She said that they are staying in the flat from around 4 months and unaware of nestaway and me. I wasn't aware of things happening when i was not in the flat. when i search my things like router, shoes. etc. were not there and most of my things are missing. As i was paying my rent on time i should be the only one in the flat as per my knowledge and notification from your side. I got a offboard notification from your side on 28th December 2020. i should not be payable for any rent for last 3 months but i paid as i was unaware of the things happening. I was my deposit and missing things or cost of them. Below are my personal items which are missing and cost of them. I have attached bills of each. The amount of router from Hathaway i paid to them as a missing device is also attached. 1. Hathaway router and adapter: Rs.2500+Rs.200= Rs.2700 (Hathaway company owned this router) 2. Spider Protein shaker bottle, 550 ml,Leak proof, storage container, BPA Free, Dishwasher safe, High quality 600 ml Shaker Yellow | BIG26 = Rs. 155 (Order Date: [deleted], 09:56 AM) 3. Density smart Running Shoes For Men BLACK- RED 8 BALENO 02 Black,red | DN 103 BALENO 02 = Rs. 429 (Order Date: [deleted], 04:15 PM) 4. Formal Shoes FSN: SHOF29GW7TYK3M5Z HSN/SAC: 6404aaab = Rs. 899 (Order Date: [deleted]) 5. Milton Executive 3 containers Lunch Box = Rs. 251 (Order Date: [deleted]) 6. Towel : Rs. 400 (bought from local market in jan 2020) 7. Belan : Rs. 150 (bought from local market in jan 2020) please help with the amount of the items or the items itself and the deposit i paid. please consider that I'm not liable to pay the rent of last 3 months as anyone else was occupying my room. please let me known when this issue will settle.