If you ask nicely, you might be able to get the over-the-top roaming fees for your mobile waived (set aside or deferred). However, you can't get them waved. Don't miss out on the 'i' and thereby show your ignorance.
This error pops up a little too often in news reporting and other professional contexts, such as this example from Windsorite.ca:
The Downtown Residents' Association, which operates the market, is also requesting that all permit fees be
wavedfor the 2014 season.
English is full of identically-pronounced words that are spelled differently and have different meanings (the most accurate technical term for these is heterographs). You simply have to learn them. Accuracy matters.
Lifehacker's Mind Your Language column offers bossy advice on improving your writing.