Sharpend
"It Just Is"
Ok so seriously I’d you do not understand the principles of a circuit nor the purpose of testing then I’m afraid you are going to find this exceptionally tough. I would in your position definitely seek some legal assistance against the training provider under the Sale of goods act to at least try and get your money back.
Do you have any of the promotional literature from the trading provider?
Do you have any of the promotional literature from the trading provider?