Texas doesn't have a specific auto-renewal law, but the DTPA (no specific auto-renewal law) (Tex. Bus. & Com. Code § 17.41) plus federal FTC rules protect your right to cancel.
Tex. Bus. & Com. Code § 17.41
Penalties: DTPA treble damages for knowing violations
SubScrub automatically cites Tex. Bus. & Com. Code § 17.41 and federal laws