Bootloop after flashing TWRP (Also lost recovery)

So I was going to root this (previsouly healthy) BQ A4.5. Unlocked the bootloader and flashed [TWRP from here](https://twrp.me/bq/bqaquarisa45.html) :

$ fastboot oem unlock
(bootloader) Start unlock flow

OKAY [ 32.954s]
Finished. Total time: 32.960s
$ fastboot flash recovery downloads/twrp-3.3.1-0-dendeone.img
target reported max download size of 134217728 bytes
Sending 'recovery' (11342 KB)...
OKAY [  0.378s]
Writing 'recovery'...
OKAY [  0.335s]
Finished. Total time: 0.727s
$ fastboot reboot bootloader
rebooting into bootloader
OKAY [  0.003s]
Finished. Total time: 0.058s
$ fastboot reboot
Rebooting...

Finished. Total time: 0.058s

The first reboot to bootloader didn't do anything. Now it's on a bootloop which states:

Orange State
Your device has been unlocked and can't be trusted
Your device will boot in 5 seconds

Pressing _Volume Up + PowerOn_ used to work for recovery (that's how I got into fastboot mode). Now, pressing _Volume Up/Down/Up+Down + PowerOn_ doesn't do anything, fastboot stands indefinitely `, and adb always responds with error: no devices/emulators found` regardless of when it's run. If I press _Volume Up+Down_ it turns off. Plugging in USB it turns on. Nothing else seems to respond. dmesg states:

[32774.364937] usb 2-7: new high-speed USB device number 59 using xhci_hcd
[32774.514434] cdc_acm 2-7:1.0: Zero length descriptor references
[32774.514450] cdc_acm: probe of 2-7:1.0 failed with error -22
[32774.554519] cdc_acm 2-7:1.1: ttyACM0: USB ACM device
[32777.142205] usb 2-7: USB disconnect, device number 59

The disconnect happens before the bq logo appears. Trash bin time?