Concern) Considering removal of the retention device

I have been wearing orthodontic braces throughout my school years, and now I am wearing a retainer.

My lower teeth were naturally pretty even without orthodontics... When I got braces on my upper teeth, I also put braces on my lower teeth, but now that I think about it, I probably shouldn't have done the lower teeth...

After attaching the retention device, one of my lower teeth fell out within a few years... it shifted slightly backward... haha...

Other people might not notice just by looking, but our family can tell right away...

My family noticed, so I was worried and went to the hospital where I had my braces done, and they told me to get re-orthodontics and charged a very high price...

I came out because I have no intention of recalibrating.

But I think I need to remove the retention device, so I called the hospital again to ask.

But the cost of removing the retention device is also quite substantial...

Are there any hospitals that didn't charge for removing the retention device...ㅠ