A construction company cheated me of 3 lakhs.

I paid a reputed company a advance of 3 lakhs for construction. but they cheated me. I have paid them through cheque. I have the proof. First company explained about type of work, materials used and gave us the estimation of Rs.70lakhs (We were super happy and convinced by their offer) Then they asked to pay 30% (25lakhs) as advance so they will start the work. But I told them clearly that i need to go for Bank Loan and asked them to wait until the bank loan process. but they asked to pay advance of 5 lakhs to block the price as by next week the prices will be increased and they cannot offer me the same price as discussed earlier. Initially I paid them 1 lakh but company forced us to pay another 5 lakhs. As i didnt have so much money, I paid them another 2 lakhs for blocking the price. So totally i paid 1+2 = 3lakhs to them. Mean time, my Bank loan was declined (it was a peak Covid time) and I conveyed the same to the company and asked them to refund my advance. first they asked us to wait for a month to process the refund. It was passed 2 months but no response from them. In the Mean time I started getting calls from many consumers who were been cheated of money from the company) When i went to their office, I saw 2 customers fighting with the management. and they conveyed us that the company will take 50% as advance of the project and they don't even move a brick and cheat them the money. its been 3 years now, they haven't refunded even single paise. They blocked our calls. they dont reply to the mails. if we visit the office, they chase us out with the help of bouncers. im very upset and not getting sleep also. what am i suppose to do now? please advice.