Not to force anything.
Explain the basic facts.
Use short sentences.
Ask questions: "How can I help you?" or "What is not clear?" or "really chcešvyd?lávat money with SFI?" etc.
Properly orient (links to specific thing).
Motivate - mainly personal example, experience.
Write a personal e-mail (in addition to PSA / CSA ??Mailer).
And most importantly: with pig-headed person not waste your time and nerves.