STM company - Online fraud work

Hello
I was looking for part time job I got an unknown phone call from male executive (Rakesh Patel) ( no. [protected]) for part time online form filling job, he gave me reference of clickindia.com.
Work profile**** forms in ** days with **%accuracy and salary would be Rs **, *** i.e. Rs ** per form. He asked for my id proof email id alternate contact no. through whatsapp no.[protected] and said I need to register through app.
Few minutes later I received mail from Rakesh patel(rakeshpat***@gmail.com) with two attached pdf files, one of sample work and the other of stm company.
HE sent the app link on my whatsapp no. After downloading the app executive called and said to upload signature and photo through app. Few minutes later I received another mail and this time from agreement department (agreementdept***@gmail.com). I was literally shocked !!! It contained contract agreement with STM Company with my scanned signature on it without my knowledge and approval.
I realised that I was the victim of job fraud/job scam. I did some research on internet and found many complaints against the company. Also the address mentioned happens to be address of many other companies such as Frontech etc.
Address: ***, galaxy emperia, warud road, Aurangabad. Maharashtra ******.
I found many complaints against Frontech also. I was now sure that this company is fraud.
Today I contacted helpline numbers [protected], [protected] in order to cancel my registration. Female executive responded that I need to pay Rs. ****/- for cancellation and contact helpline email id - help*formsfilling@gmail.com.
I have sent the email for registration cancellation and the reply was if you have cancelled the agreement then have to pay ****.
Please help me in this situation.
Hope my complaint gets resolved as soon as possible.
Also strict action should be taken against such fraudulent companies.