The micro SD Card reader was already replaced two times, and they didn't "charged" anything more than USD$5 because it doesn't need soldering.Take it to a mobile phone repair shop. Tell them that you have a video game console that needs the SD card slot replacing.
The problem is the micro SD Card reader pins in the side of the motherboard (where the reader connects to), are broken. And no phone shop has told me they know/can do it.
It's a guy who specifically fixes Switch consoles who charges USD$100 for fixing that and USD$50 for fixing the joy con rail broken connectors.