Sony Ericsson
No interset shown on my problum

I had submit my phone to sony service center. I was told that it damaged due to moisture in it. I asked them to repair it as my warrenty was lost under this condetion. Along time of two weeks were taken by them and no up date was provided. After all this I myself called and was told that the damaged part (Motherboard) was not avalable there it came back moreover the condestion of my phone was same as if it was not touched. I think that after submission no futher action was taken. So please look into the mater and help me out.