HELP - not charging afer SPS programming calibration update

Hello

I've done a calibration update on some ECUs today
First I tried the front camera, all ok so then I proceeded to BCCM Battery Charger Control Module (OBCM)

It updated:
opSW1 from 22783694 to 24270697
Cal 1 from 22801623 to 24270698
OPSW2, Cal2, OPSW3, Cal3 seems to have stayed the same

The problem is that after it went to 100%, I got an error Unknown error during service programming event. Please contact GM support if problem persists

But the car restarted and all seemed fine, EXCEPT that it won't charge

At first, the only error I got was p1e00
This was a generic error

I thought maybe HPCM2 and BECM need updating too
So I did that, and now HPCM2 does throw another error: P1EE6 Battery Charger AC Voltage Not Present

After more messing with the car (trying to charge when off/ on, trying different charger) I also got
P16C2 Battery charger contorl module random access memory performance
P16C1 Battery charger contorl module read only memory performance


I would guess that perhaps the updated software is NOT for my hardware, so now it won't work
or something elese?

does anyone know how can you flash back to the previous software with SPS?

Or any advice on what to do next?

Thanks