Nokia 2760
Mother board got corrupted

I have purchased nokia mobile before 1& 1/2 year before but now the handset get problem i get it to make it repair at local repairer of mobile but they told me that hand set can not be repaired casuse the mother board get corrupted.

can i get the answer that now there are so many important data which i lost, how can i get it back?

there is no any way to get that data? i need that valuable data may i?