Datancy Services — About the website and people who are running this

Address:	18/4 mission road landmark, subbiah circle, bengluru, karnataka,560027
Website:	datancyservices.com/customer/login.php?id=1#no-back-button

I got a message on whatsapp of data working I agreed and they just send me a web link to verify myself and agree to their terms and conditions cause I actually don't know the things that how to do this and the give me 500 forms to fill in just 5 days its just impossible and I want to quit now but they are saying I have to pay 5000+gst+service charges and saying that they will send legal notice and police yo my house what should i do please tell me