Well apparently you caught them off guard with this one and they don't have their handy little product filled replies all ready. I have found EFT (uses the body's meridian points quite effectively) can get things detoxed and doesn't have one single product involved. It's entirely free. I've used it for cadmium, gasoline (that was a nasty one) 'insulin residue', even heavy metal, which turned out to be nanobots, blah.
You need a good deparasiting too. My advice of course is get Dr. Clark's book, 'Cure for all diseases' a free download here under the book's name. Use her deparasiting protocol and make a temporary zapper or buy one from out of country, but not europe. I think they're still safe.
She might have some ideas for detoxing that substance as well. They added a lot of scary sounding but mostly unnecessary clean- ups but she might hit on that one. EFT is easy though--for detoxing I've found it's usually just one point. If you want more info, happy to share.