windows partition wiped out with debian install CD and LVM

Going by my prehistoric knowledge on how to set up a dual boot with Windows and Linux, I set out to install debian over my Windows 10 installation. My single hard disk was originally partitioned into an OEM partition, a couple of recovery partitions and a primary OS partition. For the debian install, I shrunk this primary partition and created a new one for debian.

After booting into the Debian installer, I got to the partitions sections where I thought I would be presented the option of selecting my newly created partition which I created by shrinking my original 1TB one.

However, the LVM option I chose landed up overwriting my boot record, erasing all my original partitions and leaving my computer in a non bootable state

I think all the data is still there. I aborted before LVM could do any more damage. My disk does not have a recognizable file system now.

The error I get is "The boot configuration data for your PC is missing or contains errors". I guess this is from the UEFI loader

Please help!

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