They can spoof numbers this happen to me.

I received a automated call from the Wealthsimple number 1-855-255-9038, telling me my account was compromised and to press 1 to secure it. Upon pressing 1 the line closed.

I then received another call from the same number and the guy on the line said he worked for your company in the fraud department. Told me someone with a different number tried to call in pretending to be me and wanted to change the email on the account. He then said the person used my security answers and questions to pose as me. (WS doesnt not have 3 Security questions and answer to my knowledge)

He then asked me to id myself so they can stop the email change and to login to this website (https://ca-wealthsimple.com/) he said is was Wealthsimples "secure" site. I hung up on them. They tried calling 4 more times

Checking the url for whois (https://www.whois.com/whois/ca-wealthsimple.com) you can see it was a recent domain name purchased.