P30 firmware mishap

[NNN637218887726692891]

Hello all, I have a P30 back and I used the firmware updater app to try upgrade the firmware. It had the main: 2.5.3 I think, but the firmware updater took it down to main: 2.3.6. Now I can't use it because it shows a writing error to card and the images have color lines across. The firmware updater app show more recent updates but none will actually install. I need to at least take it back to the prior firmware or find a way to use the current one. I tried looking online for version 2.5.. but I can't find it. Please any help will be appreciated.

[NNN637218887726692891]

Error reads: Image not stored:
CF008900.TIF damaged
during transfer

[Ulf]

Hi
Contact us in support right away to resolve this.
support.phaseone.com