I really feel for you... I"m living the same problem. I can't get rid of the Ascaris in my throat... thought I had it licked years ago.. but no! They can be very quiet in the colon and you don't even realise it until one day you kill a big one and a migration/scattering issue occurs. Herbs in high amounts and meds haven't touched it.. and I've been trying now for 2.5 months hard core.
At the moment I'm taking alot of apple cider vinegar by mouth. I've ordered Miracle-Mineral-Supplement (where the hell is it?) Vinegar killed it in the colon so I'm hoping it can kill them in my eosphogus (but vinegar probably CAUSED my migration issue to the throat so I don't recommend vinegar enema). With enema.. they can't really escape... but when you pour a treatment down your throat whether it be herbs or other... it only rains over them rather than soaking them.. which is what is required; and they move around so damn much.