Need to recover encrypted partition, it showing RAW after format

Dear All,

Please help me here, 

As per our security, all IT support team should have Disk encryption, so I had install the Symantec desktop encryption 10.3.1 and encrypted the disk,

my system had three partition , C: windows 7, D: Data and E: Data

but due to RSA issue I had to format C: drive Windows 7 machine and then I install the windows 8 on C drive.

but before formatting I forget to decrypt the Hard Drive... :( my Bad,

After installing win 8, my D: drive and E: Drive are showing as a RAW drives and asking me to format.

I remember the old User ID and Password for Symantec.

Could anyone please help me in this, any single option to retrieve my data: will be great help. 

Thanks