The reason for delay is your vagueness, there are no details at all.
Here's the whole text of what you've said thus far, if you can tell what kind of mac it is other than OS-X (laptop, ipad, desktop etc), from what has been posted, consider your self a mind reader.
"Months ago I bought a PNY SIMM at Staples. I haven't installed it, for what reasons I can't remember. But the Installlation Guide was damaged by water and is not readable. How can I get another copy?
Never got an answer. Cancel my account, do not charge my account.
Computer OS: Mac OS X
I haven't tried - the Owner Guide is unreadable and I need another copy.
Perhaps the type of mac, the model number of the pny modules, anything even remotely specific would have been helpful.
If you don't give details when asked, it's virtually impossible to help you, kind of like a doctor.