You say: "I have to say that recently, I canceled a purchase that i didnt do. does that have to do eith the problem that I have?"
It might, but it is hard to say. Regardless, see:
If you see a message that says 'Your account has been disabled in the App Store and iTunes' https://support.apple.com/en-us/HT208856 "There might be a problem with the payment method that you have on file. ... When you see the message, don't try to edit any of your account information."
You can get Apple telephone support for help in solving your problem using this link https://getsupport.apple.com/?caller=kbase&PGF=PGF63005&category_id=SC0245&symptom_id=23362
You can also use this iTunes Support form https://support.apple.com/en-euro/itunes-contact.
And here is how to contact iTunes worldwide support via text or chat using this link https://support.apple.com/choose-country-region/itunes After choosing your country, see the heading Tell us how we can help.