Account disabled in the App Store and iTunes message

How do I fix my iPhone 7 when I get the; ‘your account has been disabled in the App Store and iTunes?

I received an email reply from Apple support suggesting that I have to contact the Apple security team but I have no options to do so. My local authorized Apple dealer has advised that it cannot be fixed by them!! I cannot update any apps and have now totally lost access to my WhatsApp app which I need for work!

Very Very frustrating trying to resolve this as I do not know how to contact Apple security by phone, I live in Trinidad & Tobago in the Caribbean