Your business number is the first thing that defines and decides the face value of your company. Publishing multiple numbers on your brochure may confuse your callers and they may not end up calling you. It’s advisable to have a single business number in order to eradicate confusion and project a sorted image in front of the market.
But in case you already have an old number published in the market, then the following can be done:
Possibility 1: Publish a single new business number in the market to manage your business calls so that you get customer calls on the new number which you have recently displayed and slowly close your old number
Possibility 2: Or what you can do is forward those calls you receive on your existing numbers to your MyOperator number.
Read here about how to make your business number visible.