I'm not saying you're not justified, but just saying that a judge might jump to the conclusion that a guy who cuts off his wife's phone could be too controlling. Don't do anything that could be taken the wrong way by the courts and twisted around.
Filing sounds like a good plan in this situation. Does she work outside the home? If not, seems to me that until she gets an order for temporary support, you're under no obligation to pay any of her bills beyond the mortgage and keeping food in the house. I'd cut her off from the credit cards and checking account, find out from your lawyer what else you can do.
