Fini Technology — regarding fraud company

Same problem i am facing now (Data entry).. Company name-fini technology, their registration fee was 300 rs. And they'ad given work of 150 data files in 15 days. As per them they wanted 90% accuracy in that and i have'nt cleared that. Now they are demanding 10, 000 rs as a penalty or utility charge and giving me threat that i've to pay this otherwise they will take legal actions. Kindly solve this issue.