my gmail account was blcoked. unable to update whatsapp

Hi

My gmail account associated with Iphone appstore and itunes was blocked. So I created a new account with my yahoomail. But whenever i need to upadate some apps like whatsapp or need to purcahse from itunes, gmail password is asked and i am unable to login on that account. I need support for deleting the gmail account and to continue with my yahoo mail account. or I need to remove the block and to reset the password of gamil account account associated with itunes and appstore.