Question regarding warranty and butterfly keyboard problem

Hello guys,

This year i bought a fresh new MacBook Air (Retina, 13-inch, 2018).

Had a problem with the display, a purple line appeared from nowhere. Went to repair store and fixed it.

2 months later my key "s" starting to acting crazy and doubling typing sometimes.

Went to repair store again but they found that i have liquid damage and this is the cause of that. The girl from Depanero Call Center didnt know to explain me if this is the problem for my key. I asked them to return my laptop.

Laptop is working fine, only the "s" key its double typing.

In attachment you can find the photos that Depanero sent to me. I cannot figure out how that affects my keyboard to be honest. Also i cannot confirm that liquid damage its from my fault. It could be, but not 100%. Very weird.

If my problem has to do with the well-known-problem of apple butterfly keyboards its not possible to replace my keyboard by the authorised service of Apple? They didnt care about my problem and didnt search if the problem is from liquid damage or if this is the problem macbooks's having all the time.

https://support.apple.com/keyboard-service-program-for-mac-notebooks

Thanks,