Nothing is more aggravating than a batch that doesn't carbonate. If you're gonna bottle as opposed to kegging, then "Hey! __it happens."
What I do when it happens (and fortunately, that's not often) is I uncap all my glass bottles & pour off my contents into plastic (PET) soda bottles, cap 'em with Fizz Giz caps & hit 'em with the Fizz Giz dispenser preset to reach desired 15PSI or thereabout. It's a quick fix and I don't stay pissed off very long - especially if I can quickly chill my potion.