BBB tends to be kinda useless, but worth a try.
Does TX have a Dept of Consumer Affairs?
Small-claims court is also an option. But start by writing 'em a letter (registered, return receipt requested) demanding your money back and stating that you don't want credit or replacements. Your attorney can also write the letter, which would signal that you're ready to follow through, but it's cheaper if you go this route first.
If you bought it on a charge card you can dispute the charges through the credit card company.
- NF