Sorry it didn’t work. They don’t promise it will but like you say, they back it up by refunding your money.Well, I tried.
I did my first round of pills and then ate w/out taking Lactaid pills.
And boy! Was I a MESS! Bloating, pain and bathroom visits at 2am, 3 am, 4 am,until the LOMOTIL kicked in.
BUT… true to their promise, they immediately processed a refund. Good on them.