Is there anyway i can avoid payin the RIDICULOUSLY high internet charge when on andorid market on phone?

I went on a only a few mins yesterday, downloaded measly 4 free apps, and it used 20 euro credit!! i rang customer services and was told it costs 99c per kb or something.. i know i can buy a monthly add on, but that only covers 500kb a month..is there any internet site etc i can actually get them for free from?