I messed up and got a Nintendo Online Membership and I worry that
even if I don't activate it they'll still charge me for it. I don't
know how to get rid of it
You cannot hide from danger. Death floats on the air, creeps
through the window, comes with the handshake of a stranger. If we
stop living because we fear death, then we have already
died.
A quote from Raistlin Majere.