I have no idea how it works in MP but I think that it’s a good idea to have a balance in PP for situations like that.
Have you already started transferring the money from your bank to your PP account? In the US PP will no longer access your bank account for a refund but I’m not sure if they still do that here. If you know someone else with a PP account who could send you money, that would be the fastest way to get money into PP.