Profile funding fraud

I am a victim of profile funding fraud by builders. I had no clue how the whole purchasing of a property works and someone at my workplace recommended to get my profile funded for some extra money. I was told to take a loan in my name and the builders will settle that after 20 months and will pay monthly emis to the bank till then. I got 3 loans on my profile for 3 various builders (broker got it done) and now after paying regular emis for 1 year the builders have stopped paying the emis. I know how this will come across since I am educated enough to be fooled like this, but I don’t have any papers from the builders regarding our deal and I have managed to get the initial documents for property from the bank. I have all the what’s app chats with the builders regarding this and now I have asked banks that I would like to surrender the property. Banks are telling me it’s not their concern and I have to pay the emis else the account will go npa and they will send me a legal notice. Pls suggest what do I need to do to get out of this and how much time will it take? I am so stressed because of this and not able to do my daily chores because of worrying. I really need proper help and guidance. P.S : I have never met any builder nor visited the property and was only in touch with the brokers Builders : Geotech Promoters, JSS Buildcon