Vauxhall zafira b central locking?

Hi everyone!! I have a 07 plate zafira 1.8, the central locking doesnt work at all. I have tried a new battery in the fob and re-synced it. All that happens when you push unlock button for a few secs the windows open and press lock the windows go up. the dash button doesnt work either., The fuses are all good, and I have checked the wiring in the door posts and tail gate hinge. What would be recommened next. Many thanks