delayed applications

hi we applied family class since 2007 and we have a agency here in philippines we have contarct with them, i paid file application so we recieved a sticker file number from embassy, in the letter says their that we need to wait for 48 months so its 4 years already, I paid again last 2008 a waived interview, and last 2010 our agnency called up us to pay again for my so that we can go 6 to 12 months eventhough we didnt reach that 48 months but sad to say that we that much money to pay. I wanna knows whos here what is the status of my application coz till now no progress its been 4 years already...can i withdraw that process and file another application or can i continue that with out agency? pls hekp me we spend a lot of money already here..tnx