I’ll have to take a look at that!
Anyway, to answer your question, what you could do is add the PayM logo to your invoices (take a look at this topic), and add the mobile number there too.
http://community.quickfile.co.uk/t/trade-association-logos-in-footer-area-changing-size/2127
Then just either import them using QuickFile’s bank feeds, or manually input them as and when you reconcile it with your bank statements.
I’m not sure there would be an automated way for Quick File to detect and import these due to constraints within the banking system on sharing data (except Barclays), but I could be wrong.