What is the sex? Females can turn blue when being cycled for breeding. Some turn back and some don't. I don't know what you paid for it, but blue line animals start at around $3500 for a hatchling from a potent pairing....with no guarantee of a blue adult. Solid blue adults can range for
$2000+ for an import, up to $10k+ for animals with any sort of proven lineage.

If you have a male, I would ask for a refund. The only males I have seen change color are the kaufia locales. They will go from green to yellowish from day to day. Post a before and after pic if you have them.

Good luck.