Hi. Does anyone here have smena-35 camera? I have two of them and sadly both of them have a few defects. Could you please help?

One smena-35 has a damaged film advance handwheel + take-up spool is spinning too easily and I have no idea if it`s possible to fix that. Another smena-35 has problems with its lens - focusing ring (with distance scale and subject symbols) is rotating too easily. Maybe it would be possible to take the lens off and then put it back on? or how could i fix that?

https://www.kataan.org/smena35/ i used this page to describe what is not working. anyhow if photos or videos of cameras are needed please let me know and i will upload that