I'm sorry this is happening to you! How awful.
When my band slipped, the only symptom was GERD and esophagitis.
When I had my band out, I also chose not to revise. So, the surgery was pretty easy. Not much pain. I had a brief progression from liquids to solid foods, but much shorter than with the original surgery/weight loss process. I immediately felt better and aside from your normal post-surgical issues like a little gas and the incisions, it was a breeze.
Good luck!