My WhatsApp Account Closed

In the middle of the night on May 19, my WhatsApp account was deleted without any warning. I still don't know why. That's just a guess, but I think it might be because of some third-party apps I had on my phone. I really didn't do anything wrong, and this action has totally caught me off guard. I feel ignored and unfairly treated after being locked out for good without any reason. I thought that a tool like WhatsApp would be more open and easy to use. Please give my case a good lookover and get my account back if you can. Please think again about this choice and help me get back into my account.