Remember porting my number and had to respond yes, it was handy because I had two phones which made things easy. Could see if you can contact bell again, or go to the physical location. Submit a ticket again with public mobile.
A critical part to porting is to receive a text from your old provider and you have to reply YES within 90 mins. If you are not receiving calls and text on your PM sim card, and only outgoing calls work, then you might have missed the step and hence porting was not completed
There is a number to call to talk to live support, they can re-trigger the process for you. I will message the number to you via the Community inbox ( https://productioncommunity.publicmobile.ca/t5/notes/privatenotespage ) . Check the envelope icon on top right. Call them and get it fixed