Nothing working

iv owned my peugeot 307 hdi sw 2002 for 6months 3 of which has been stood over the cold weather i final got to use it and the battery was low and wouldnt start so i jump started it which fired 1st time used the car for a couple of days the i got out lock the car come back after half hour and the back wiper was going even thow the car was lock and turn off so i tryed to unlock it with no joy only door would unlock with key is the drivers door try starting with no joy head lights turned on so i disconnected the battery checked fuses under the bonnet then in the car . still no joy when i put ingion lights sounds like a relay was clicking now iv got nothing its like theirs no battery on weid i think its the bsi please help