Hi there,
So if it shows up in BL mode , What’s the issue?
Connect to the IDE on that New Com port and send it a Known Good Code or even better Drag a uf2 flash file to it. (that already has the bootloader and softdevice in it.)
Look at the Uf2 thread and pick any of the examples. That will bring it back from tha bad code you sent it earlier. here’s the RGB blink one. (basic) unzip and Drag & Drop. 
HTH
GL 
PJ
FYI, It’s NOT Bricked if it will enter BL mode. 
