What you are seeking is damages for the trimming of the shrubs, which is a civil matter.
That is true but the rest is debatable. The process could be easier and more satisfactory by firstly presenting a bill for the replacement bushes then, if the owners corp doesn’t pay, taking them to the Small Claims Division of your District Court, where you are not expected to be represented by a lawyer.
Have a look at this Fact Sheet. It seems you don’t need to engage lawyers at all if the bill is under $10,000.