VOX has messed up the porting of my Business Telephone !!!!

We app**** to VOX to take over my business telephone number in May onto their VOIP system as Neotel were closing down their telephone business. It is now July and after various queries this has not happened. It is now July and Neotel have now shut down their telephony system. VOX have not ported my business telephone number and now I cannot receive any business calls .... !!!!! This has been a terrible business decision to port my business telephone to VOX , as I now cannot receive any client telephone calls .... who will pay for our loss in income due to the stuff-up by VOX ???