Given the better safety profile, I guess I would have instead first tried taking a seven day course of nitazoxanide, which has been shown effective against round, tape and fluke. I might also consider taking a one-day course of praziquantel in the event it's actually some kind of tape.
But a month-long course of high-dose albendazole and some ivermectin doesn't really seem like the first logical follow-up after mebendazole doesn't seem to cure. This is for reasons of both likelihood of benefit and risks for toxicity.