score:5
This is unfortunately a common problem these days, and LATAM's behavior is not unique. Since Covid in early 2020, airlines have consistently refused and delayed and avoided paying claims. Search on this site (top of the screen) for "Compensation delay." Airlines sometimes act this way even when directed to pay by a government agency.
The best you can do is to be polite and persistent. Being angry and disgusted with LATAM is not going to help you: your emotion will get in the way when you call or write the airline trying to convince them to process your payment. If you worked for an airline, and were confronted via call or email or message by an unhappy demanding passenger, you'd put their demand at the bottom of the pile, not the top. Or you'd discard it.
Finally, this isn't an attractive class action proceeding. I'm a retired lawyer. Class actions aren't available in all jurisdictions, and even if available, class actions make no sense when class members each have different facts and evidence regarding their individual claims, and are likely scattered around the globe in different countries.
All in all: if LATAM pays, well and good. But if they don't pay, I suggest you consider how long you want to keep being angry and disgusted over a $50 loss.