If you have called and got no answer, send a letter to his address demanding that he call you immediately and outlining the efforts you have made to contact him. If you do not hear from him, you can then file a grievance with the State Bar of Texas.
I'm sorry that you have had such problems. There really are some good lawyers out there.
Based on the information that you provided, it is difficult for me to tell if your current attorney has done anything wrong. However, the attorney should call you back and communicate with you. I agree with Ms. Henley that you should send the attorney a certified mail letter explaining when you called, why you called, what you desire and request that he contact you within a time certain. Also, request a detailed and itemized billing statement from the attorney. It sounds like the attorney has not actually accrued much time in the case and you may be entitled to a partial refund.