Hi!
I was able to dispute all the 4 charges with Scotiabank.
They weren't willing to first, since disputing transactions made at the terminal machine is not normal (disputing online ones is). After explaining them detail by detail what happened, and e-mailing the cash receipt for the service, I was able to dispute the 4 transactions.
Scotia said there will be a 30 day hold on the transactions, and I'll be refunded then.
And honestly, I used my card at multiple places that day. Did not have this happen anywhere, but here. BLS doesn't have the best reputation, so I won't be surprised if there was something nefarious going on.