Restore data from Flat & Sesparse VMDK

Hello VMware community. I use VMware ESXI 5.5,

I have VM with VMDK 15TB, by mistake all snapshot was delated, when ipoweron the VM fond only 11.5GB old data from 2016 !!

I found 3 VMDK :

• Xxx1_1-flat.vmdk (with size 11.5GB)
• Xxx1_1-000001-sesparse.vmdk (with size 2.5GB)
• Xxx1_1-000002-sesparse.vmdk (with size 15TB)

I only can mount the Xxx1_1-flat.vmdk and I found data from 2016, when I download those vmdk’s to windows server I found the size was changed , Xxx1_1-flat.vmdk downloaded with size 15TB, Xxx1_1-000001-sesparse.vmdk downloaded with size 62GB.

I need to merge those VMDK’s to be able to find all the data, or any other idea ??