Thief at Marton Mere!!

We have just returned from a week at Marton Mere Haven, and basically our caravan was broken into!!! We stopped right in full view of loads of other caravan and stayed in Regency, we came back from a lovely day to find someone had climbed in through my sons bedroom window and stolen our Sat nav, my sons headphones, chargers, a camera, watch, an ipod my purse and other things! We reported this to Security and they informed us that this was the first crime in over a year, we didnt feel satified with this so then contacted the police as Marton Mere didnt!!! and the police informed us that they had been on the park twice previously that day!! hence the security guy was lying and obviously Marton Mere dont like to broadcast the fact that there are thieves on the park! I would not stay there again and I would say to anyone who is going make sure you take all your belongings out with you and please make sure to caravan is secure before going out!