Peugeot 206 locks?

My Peugeot 206 has dodgy locks I'm trying to fix but getting nowhere, when I got the car only putting the key in each door worked and the boot didn't lock at all, I put a battery in the key and synced it, now when I press the key fob I hear alittle noise but nothing locks, I changed the drivers door actuator but nothing has changed, did I get a dodgy actuator from the scrap yard? I took the card off the boot and found that the windscreen wiper and lock wasn't even plugged in, so I plugged them both back in, (windscreen wiper still doesn't work btw) but now the boot is the only lock to lock with the remote but it stays locked, again I hear a noise when I try to unlock it but nothing happends, I have to climb into the back and open it manually, what's my next steps?