Okay, on a positive note--I think it was a really good idea to give Canada a try before turning 21. You definitely need to get some real-life experience in.
Now, "the bad"--YOU SHOULD BE SEEING A TC OF +6 ABOUT ONCE PER HOUR! Also, you know you were over-betting your trip's bankroll, right??
So, how do you detect a cheating casino? (I DON'T THINK YOU WERE CHEATED BUT LET'S ENTERTAIN THE IDEA.) You would have had to note the exact RC when the shuffle card was thrown onto the felt. (I'm assuming the RC was very positive. If it was neutral or negative when you stopped playing, then I REALLY, REALLY DON'T THINK YOU WERE CHEATED.) Now, if you were a shuffle tracker and they weren't ASM (which they probably were), you could conceivably track the cut-offs and compare it to your shuffle point notation. Without ST'g, you'd have to count the next shoe and the next and the next...
Noting the RC at the shuffle point every time. I don't what type of sample size you'd need but I'm guessing around 10 which might take about three hours. Then, if you told me the RC was over, say "+6", at least 80% of the time, "I'd say there was a good chance that you were cheated."
LOL--but that's just stupid little me--that won't help you with the Ontario officials--they probably wouldn't even listen to you, more less believe you.