Maybe you need to write your tickets better. Mine are always answered within 48 hours to a few days. Also, sending in more than one ticket for the same issue isn't going to get you a response any faster. If anything, it'll just delay it.
Reminding them is one thing, but annoying them is another.
I usually submit one every 3~6 months if they don't answer it. For example the hacked Vindictus one has been open 3 years and I've submitted 3 other tickets about it.
So I don't spam the crap out of them or anything...it's just so many issues they're not helping me with =/