Infinity Solutions — fraud registration and threatening me

Address: 395001

I m ashish frm jhansi.. One day i hv receive a call frm sahil patel offering fr part time job form filling work.. They hv done my registrstion without asking me... Nd no demo work directly send work... I refused so nw they r threatining me to pay 6100 rs. Otherwise legal action... Tell me wht should i do... They all r together to work for earning money by fraudening nd thratining so i request to consumer forum t take legal action against them