It is likely that someone is spoofing your number and is mass calling a bunch of people to get someone to pick up. https://crtc.gc.ca/eng/phone/telemarketing/identit.htm

The government has taken some steps to combat this kind of behaviour. They implemented the STIR/SHAKEN framework, which is a caller ID authentication and verification measure. While it has helped decrease the number of nuisance and unwanted calls, there is only so much they can do and the system is not fool-proof.

If you are continually and increasingly being inundated with a bunch of calls from other people, you can consider enabling the call control feature on your Self-Serve account. Feel free to visit the following link for more details. https://www.koodomobile.com/en/help/call-control

You have been the victim of number spoofing. Some scammer spoofed your number to call a whole bunch of people, so they’d think it came from you. 

Unfortunately there is nothing you can do about it, except wait for the scammers to move to another number.

Same thing happened to us. It was really hard to deal with the angry people yelling at us to stop calling them, because we were quite innocent… but eventually it passed.