Empty band still causing issues I think

Hi, I had a band fitted in the UK Autumn 2017 and all was well until summer 2018 where I started to get terrible acid reflux and vomiting after eating. I had a barium swallow which showed my band had slipped and they completely emptied my band pending removal. It eased my symptoms initially but since December ish last year I am regularly suffering attacks of vomiting which typically last 24 hours, bear no relation to what I’ve eaten and after the initial food, is just acid. I am under investigation as I’ve moved to Denmark but I was wondering if anyone else has had these symptoms from an empty band and if so, what was the result? I can’t even keep water down until it’s passed and the pain from the acid is unbearable. I’m taking ranitidine and had a barium last week which showed no blockage and my band sitting fully open. I get sick like this every 7 to 14 days