Customer mad about illegal use of my product

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Just received this as my first ever customer message and need some advice on how to handle it.

My product is for legal use only (Trying to cheat a drug test is illegal) Also products were FBA and all seals should have been fine when i sent them off.

“I just ordered a (PRODUCT NAME) From you. Getting straight to the point, it arrived with a popped safety seal. It didnt leak it was all caught by the cap so it went unnoticed until 3 hours prior to test. With no other options available locally I drank it despite the broken safety seal. Guess what?? I failed my court ordered test. I have been using (PRRODUCT NAME) for 8 months now, and I have the process & timing down to an exact science. My toxin level is the same as usual with no additions or subtractions. Abstained from toxins 48 hrs. Stomach was empty. 3 full bladder urinations prior to test. Sample collected mid stream.
I’m now in an absolute world of s*it and looking at a probation violation, probably jail time. Setting that aside for the moment doesn’t (PRODUCT BRAND) offer a money back guarantee or at least a replacement (property sealed) bottle??”