I'm so sorry you went through this and having a wrong person treating you is very disappointing. I've been there and my current doctor has done his best to keep my spirit up. In three years I only had one endoscopy and it was done after my throat healed enough in order to minimize discomfort. After that, I had to show up twice a year for check up if everything was under control and immediately if not. Every single time he wanted to know every symptoms I had, how often I had them and he would do palpation of my abdomen. Have you discovered your triggers? I learned that eating roasted sunflower's seeds helps a lot, only not because of the seeds but swallowing, as saliva neutralizes acid
I really wish you get some serious treatment at the hospital. If not, you could even come to Serbia (that's where I'm from) since it it's not that far from you and I could send you contact details of my GI specialist.