First, you need to have cartridges that does NOT have less than 15% full – these can be reset reliably
This video => https://www.youtube.com/watch?v=7kCc5fwssVM
shows how to prepare the cartridges, and where to buy the tool to reset them.
Then go to http://www.inkjetmall.com – a full set of nine 220ml (almost 3 refills) quality refill bottles of ink will cost you less than a single set of original Epson ink (= OEM ink).
There also is an option of dye inks, which are even cheaper.
Now, there are general color profiles to try out,
but in the end… You MAY need a way to profile paper; e.g. a Colormunki (best) or a Spyder print” (somewhat less accurate)