Wrongly failed test?

Cheddars:
Hia guys,

Long story short I failed my C+E last week and this has been eating at me since. The test (in my opinion) went ok and I managed to accumulate 2 minors, however I failed. He stated I cut up another vehicle on a roundabout, I am 99% certain there was nothing there.

I am a little unsure what happened and am really questioning my driving. I’ve come to the conclusion it just wasnt my day to pass, but also thinking this was uncalled for and should appeal, but dont think this would get me anywhere and I should learn from experience.

What is the best action to take?

Best action is to take a retest. If you appeal will take months before you get an answer and even still they wont be able to change it to a pass.