Your best option is to contact public and explain the situation. If they can’t help, you can block the payments from being made to public and that should cancel the account once your monthly term runs out. If you want to keep your number, you can alw...
What’s best for you depends on what you need. All of the CAN-US and CAN-US-MEX Plans will work the exact same for roaming in the USA. Telus has roaming agreements with AT&T, T-Mobile and Verizon in the US, so it’ll use whichever depending on the area...