Peugeot 307 - Central locking - Claire23

Hi,

I purchased a Peugeot 307 (from a private seller). It was after receipt of the car that I noticed the central locking did not work. I took the car into my local Peugeot garage, they kept the car in for one day and said that there was nothing that they could do???
I'm not even sure if I have the original key.

Any advice on how/if I will be able to get the central locking working would be greatly appreciated.

Kind Regards