Dunno how exactly they would do it, maybe over the email address you are logged into AL.
If you have changed it during the time ofc it could cause complications.
I heard in most cases you will get refunded for all apps/service offers you completed successfully and which are not older then 7 days. This in a period of 1-2 Days. (I can not guarantee this though).
Or check these articles:
http://support.spacetimestudios.com/...ffers/articles
Whirlzap made a thread how he got 400 plat refunded for failed offers or so, remember?
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