Moble Hand set Nokia 7210
Set damaged in service Cente

Dear sir,

I had submitted my handset Nokia 7210 with minor problem in service centre on 23-09-09.They gave me the deliver date on 23-09-09 only. Now when I went to collect my set my set back cover was not fitting properly. I again submitted the set, they told me to collect the set on 2-oct-09 due to puja holidays. I went after puja to collect my set, that time my set didn't start and they told me that they will send it to Nokia for replacement. Now when I am calling them on 14-oct-09 they are telling that my set was liquid damaged and the will charge me. When I had given them the set in working condition they have did my set dead and askin g for money. My set is under warranty and has just completed 6 months

please help me