Pexiv — threatening and asking for money

I was to contacted by this company and i had done the contract with them and was facing some problem with the forms filling so i tried calling the number given and it was always switched off. And after 9 days coz i coundl not complate he worlk they called and demaneded money first for some 4000 plus and then another 8000 plus otherise they will take me to court and gave me deadline till 1 pm and called me up at12.30 i think i got a bit acsred and i paid them something like 13100 into the accout no provided and they said after that the contarct is over and i would get a noc from them. I gt the noc from them and now after days i get anotehr call from a lawyer saying the thing has gone to court and i have to pay another 18000 to cacel the case. These people are really ripping people off. I would apprecaie if somone can help me. And they speak in a weried way you dont even understand.