my apple account balance of 800$ has been disabled seeking assistance

Contact iTunes Support for assistance. See the Apple Support articles below for contact information.   

iTunes Support – world wide 

Apple Support schedule phone call      

If necessary, try Twitter

https://twitter.com/AppleSupport.          People have posted it may take an hour or more to get a response.

I have the same problem and the agents are so useless! They have no idea how to solve this problem so they just kick me around again and again!