how to repair unllocated seagate hard disk with backup plus write protected by Bitlocker

[Shein]

Few months ago, i encrypt my Seagate Backup Plus External Hardisk 1TB with Bitlocker(window 7) and no email backup was made.And then, my girlfriend delete the Bitlocker Recovery Keys. Now, the External Hardisk is not show in My Computer and show as Unllocated space in Disk Management. Can't initialize because of write Protected by Bitlocker. I've no ideas how to get back my data. I've already tried M3 Bitlocker Recovery Softwares and nothing happen. So, please help me....

 

[Brunostako]

Reformat it.