I had to say this, as this maybe the most riskiest idea I submitted. But, As the changes are revolutionary, so must the offers and other stuff.
Public Mobile should actually consider a truly revolutionary offer to New Clients: The first 7 days, you can try and see if you are happy W. the service. If, for some reason you're not 100% Satisfied, PM will OFFER a refund of what remaining bal you have, minus the days you used so far. Just to entice PPL to at least try and see if they can adapt to the changes. Something that reduces major risks, and creates the warm atmosphere of understanding. This can certainly go along way in smoothing out the differences.