Welcome to IT tech support, I did that job for a while and then moved into a more general all round admin/support/everything remotely IT related role rather than just purely a telephone monkey, I came to loathe telephone tech support after a while, the other stuff was fine though. From what you have said you get paid more than I did, if you do earn 30k a year, a great deal more than I did ...and you still have your job, I do not, I was made redundant at the end of last year, as it was cheaper and made more sense for the company I worked for to simply pay another company to send someone else to do what was needed, when needed (especially now at least some of the office staff realise that you 'really' can fix many of their problems by hitting reset ... that clears a good 50% of the issues I dealt with, generally)
Anyway, my point is, IT Tech support and systems admin is just a basic 'job' ...it isn't much of a long term career choice in of it's self, it's also not that hard, sure there are good and bad people involved, but as one chap already said, a good portion of the job is just button clicking for the most part ...having said that a lot of people who do the job can't do much more than that, ask them to do some real fault finding and thinking beyond the list of solutions in HEAT and they aren't so hot (ahem

) ...basically if you want to stay in IT and make more money and be less bored, you need to specialise and move into an area where fewer people have the skills and are in demand, as several people have already said. Bear in mind that IT as an industry is fairly saturated these days, unless you are a skilled programmer or some sort of specialist developer at least.
As for me, I am glad I got out of it, I wanted to get out of it for quite some time and as it happens I was pushed in the end, as far as I am concerned it's actually a positive thing, because I am now using this opportunity to change things, to retrain and gain an entirely different set of skills so I can move into another industry, one where I can, in time hopefully become more independent and work for myself, perhaps set up my own business etc. I got so bored, and unfit sitting at a desk 8 hours a day and answering the phone. Doing what I was doing before, and what you are doing now ...you'll always be someone else's 'expense' ... and not a particularly hard one to replace at that ...thus you get paid accordingly.
That's life. As cliché as this may sound, unless you have some sort of benefactor or a rare talent that you can exploit with little effort ...you mostly only get out what you put it, you have to work hard and be good at what you do to make lots of money ...well you do if you expect someone else to pay you lots of money.