I very recently, as in less than 2 days ago, ordered something from a site called Canada Computers and now I'm starting to get spam calls. I wonder if it has to do with that or if it's coincidence.
@Obice it's been a while, but I have ordered from Canada Computers in the past, with no noticable uptick in spam calls. Likewise, though I don't forward my Fongo number to my cell, Fongo will come up on my phone if someone dials that number, and I've had maybe 2 or 3 spam calls on it since I activated 2 or 3 years ago.
Honestly, these spam callers don't need you to use your phone number somewhere to call you. They use "robo" or "auto" dialers (https://en.wikipedia.org/wiki/Robocall) to iterate through every number in a given range of phone numbers, and then carry on to another block of numbers, and another, and another.
So like, say your phone number is 604-555-1212. If today is your "lucky" day, someone's autodialer may have been set to dial 604-555-0000 through 604-555-9999, and hey, that included you! Unfortunately there's little you can do to prevent this.
My general rule of thumb is, if I don't recognize the number, and I'm not expecting/anticipating a possible call from a company or person whose number I don't know ahead of time, I let it go to voicemail. Easy enough to delete the message, and then block the number after on my phone. This is a never-ending battle though, as they can just change whatever number they are spoofing on the outbound caller ID and keep trying.
It costs them very little to keep doing this over and over, and they are going to hit some poor suckers whom (somehow) don't know any better--typically confused elderly people, sadly--and manage to take them for some money. It's super-sad, and these "people" (and I uses the term loosely in th ecase of these scam artists!) deserve to be sunk to the bottom of a deep, deep ocean with no scuba gear.
EDIT: sorry, I just realized my "rule of thumb" part is a duplicate of what @hairbag1 already wrote. Sorry, didn't mean to duplciate you!
My best suggestion is don't answer unless you're confident you know who's on the other end.
I used Canada campers for long time never had issue with my phone address nor credit card. I highly doubt they would sell such info
Be careful, 99% of them are scammers. What I do is once I get a call and realize they speak a different language, I hang up and block their number permenantly. Never have to deal with them again.
I have noticed a big increased in spam calls...duct cleaning, DHL, threat that I'll get arrested if I don't pay my CRA tax...etc. I would recommend blocking these numbers on your phone but the problem is, majority of the time, the number that displays are valid tel. number from innocent people, they phish these number. Unless the govt. really crack down on this, we just have to put up with it, and cracking down is not simple as most of these calls are originating from oversea.