Problem with billing, purchases, apps downloading and update

I have a problem. I did not want to charge a paid subscription to the application

(Sleep timer and nature sounds, Premium Weekly), it happened by mistake. I deleted the application and canceled the subscription. But AppStore is still trying to charge me for this subscription. Moreover, I can not update and install other applications. Because the pop-up window "There is a problem with the previous purchase." I do not want to continue using this application and do not want to renew my subscription.

And also I want to be able to update existing applications and install new ones. I ask your help in solving this problem. Thanx.