Why does iTunes keep asking me for a credit card?

I made my iTunes account on my computer and for credit cards I put none. I don't have Internet anymore so I'm just using my iPhone. But I used my moms credit card to buy a couple apps. Then my cousin stole her credit card so she canceled it. So I tried to take it off but it won't let me even download free apps or anything it says that I have to fix my billing info, but I don't have a credit card please help!

Buy an itune card, and use it.

  • Why does my iPhone keep asking for updates? I've done the iOS6 update two different times and my phone just asked for it again yesterday. I don't understand. I have an iPhone4 btw.
  • Why does my iPhone keep asking for my Apple ID password? I have a 5c and I'm on IOS8. I went on it today and it just randomly asked for my password. I entered it but nothing happened/downloaded. I was just wondering if it was a glitch or something.
  • Why does iTunes say my credit card number is wrong? I have an iPad 2, iPod ( 4g ), iPhone 4.So it's been like a month since I couldn't get any apps. I've re entered everything and nothing still works! I've tried to do it from my laptop and computer but it still doesn't work. What can I do to make this work?
  • Why do they keep asking to agree the terms & conditons? In the app store on my iphone i'm trying to install the tumblr app and this pop up asks to agree to the terms & conditions and I have like a billion times but it still won't allow me to download the app without agreeing to the terms and it's really annoying