Calls frequently, days and evenings. I have never answered. Caller never leaves a message, just hangs up. Persistent.

He claimed to be calling from CIBC offering me some kind of credit card.  This is not really CIBC since this bank do not offer cards to their customer this way.

Calls often...just dead silence and hangs up!

Called claiming they were from CIBC and then tried to get private information from me.  I said I didn't feel comfortable giving out any information to a random caller claiming to be my bank and ended the phonecall.  They still call frequently, though, never leaving messages.  They are bastards.

Decided to pick up on latest call. Appears to be a call centre, apparently representing a number of clients based on info above. Male caller, calling on behalf of CIBC credit card services (I do have a CIBC card, so this makes sense), wanting to enroll me in balance protection insurance. Was pleasant and accepted my response when I declined.

I am fed up paying for a private number and getting this call 3 times a day.
Will look into legal action if this does not stop immediately, I have a very sick person living here and it is interupting their life very negatively.