Keeps calling but I never answer and they never leave a message

It's the Royal Bank of Canada.

They keep calling me in my office and I work for a Financial Institutino, I never answer it either; and they have yet to leave a message.

Same.  They keep calling but no message.

I have received calls from this number in the past but no message has ever been left.  It is a Royal Bank of Canada phone number but when I call it, the number is no longer in service.