nashua mobile disappears

i have recieved cellular bills from nashua mobile for november and december 2014. i made my payments as per normal just to recieve a huge bill from vodacom saying that i now owe them money. when i tried to call nashua mobile all their numbers dont exist anymore and my money is gone, does anyone have a contact number that i can reach nashau mobile. this is shocking and i am sure that many people out there have also being in the same situation that i am in now....please help