Bad service and overeager ***** department to block customers

Again my account was blocked without any notice. ***** is investigating the case without asking me for any documentation. How do you investigate something without any documents or proof. Its is bad service not to let the customer know account is blocked or do a follow up. When I email I get answer they are busy investigating. It feels as if some one is sitting in *****, is bored and punch stop account. They must be taught about customer service.