Gs Solutions — gs solutions cheated me with 4500/-

I have taken the work of completion of 800 forms filling. But the company changed the font style which was quite difficult to understand, due to this i made many mistakes. I asked help from them to change the font style. But no help i received from them. Any how i managed to complete 740 forms before the last date. And now they called and asked to submit 4500/- for non fulfilment of t&c, otherwise they will take legal action and police will arrest me. I belongs from a poor family and i earn my living by givings tuitions along with my studies. And 4500/- is a very big amount for me. Suicidal thoughts are coming into my mind.
I have given my course fees for this.
This company is looting the poor family.
I only need my 4500/- back.
Please help.