Really? I go out for New Years most years and have never seen this. Maybe things might be a touch more expensive but never even anywhere near double.
You need the cabbie's number, not the cab number. Found this out trying to complain about a cab's driving once. They told me a single cab can have over 5 different drivers and there's no way to know who was driving it.
But how far do you get in 15 minutes in Barrie? I live within only a few KM (maybe 6 depending on how far you're going) of downtown, it takes maybe 15-20 minutes and it costs me around $20-25. Also, where do you find a tow for $40? Last time my car broke down on the 401 about a km from the Dixie exit I was charged $200 to tow it to Pearson, less than 8 km away.