immobiliser prob help needed
 

hi all i am new on here and i was told this is the best place to come for help.
i have a audi a3 on a v.reg i dnt have the key fob for my car and i cnt start it as i think my immobiliser is on i have started it b4 without it but it just wnt start nw can any 1 help me please:confused:

Won't start as in catches for a while and goes out or the engine turns but doesn't fire, or the engine doesn't turn?