Uc Solutions — threatening to pay penalty or else legal action will be taken

I'm a professional accoutant, looking for a part time job. I got a call from a company claimed to be "uc solutions". After giving them my id proof i got the job on conditions that i had to fill up 1000 forms in 10 days and i would get rs. 20000, if i failed to do so, i had to give rs.5200 as the company maintenance fees. But after 9 days the website where i was filling the form (http://onlinetask.in/Customer/Default.aspx) got locked and then from consumer complaints forum i found out it was a scam and i did not take any action.
Now i got call and messages that legal actions will be taken against me by firm known as associates advocatefirm (Email:[protected]@gmail.com) what should i do?