TexasCHLforum.com

It sounds like they are trying to take advantage of you. Instead of accepting responsibility for their mistake, they want you to pay for their mistake. Even worse, they aren't just asking you to cover the cost of the certificate but they want to make a profit on the certificate to reward them for their mistake. If I understand correctly, you paid $135 to a shooting range for the CHL class and they hired (sub contracted) the instructor to teach the class. I think the range and the instructor need to work this out between themselves and you shouldn't pay a penny for their mistake.

I would also complain to DPS in Austin. If the instructor and range don't make it right this week, I would make the complaint formal and in writing by Certified Mail.