Infonex — fraud done by infonex

I digitally signed in agreement for infonex on[protected] next day they not given work and they called me asked for plenty of 10000 for cancellation of agreement then i paid i recieved certificate after 2 days then next day i got a call from advocate they asked to pay me 20000 for cancellation of agreement and told me that this amount is refundable in 3 working days, so i paid this amount. After that they ask me for 30000 and i refused to pay and now they are saying that i will receive a legal notice and didn't refund me that amount pls help me to solve the problem