I cannot comment if you are "underpaid", because I won't know your job performance is lousy or not. I have seen u-grads having worked few years with a bad work attitude and personality. They are not helping the company to achieve anything but to slow things down and impairing morale in work place. For those people even $5000 a month is over paid.
Anyway, I should talk about you skipping the wordings and assuming you are a normal person : )
You are indeed low paid, in veiw that you can find a job easily with higher wage. 傳媒 is by tradition a low pay industry to u-grads, same to merchandising. So if money is becoming more important to you, try to find a new job in other sectors. THere will be lots of new openings after this lunar new year.
GOod luck : )
2007-01-07 12:54:23 補充:
但不是中港科大這三間名U: It really doesn't matter as you have been working for years. Most recruiters will judge more on your achievements in the past years, rather than which u you are from.