I don't think anybody at ServiceNow can do something about it because csa exams are wholly operated by kryterion.
That's the problem with offsite online exams. If something goes wrong with the your pc, network, or your camera, it's the responsibility of the test taker.
The best you can do probably is to allow you to reschedule to retake the exam.
I know it's kind of dangerous now, but i still prefer to the on-site exams because if something goes wrong, it'll be the fault of the testing center and they'll let me re-reschedule the exam without too much fuss.
BTW, I actually have experienced technical problems at testing centers several times and they've always been nice on letting me reschedule the exams.
