Battery dies after dropped to 0%

My iPads battery fell to 0% one night as i didn’t let it charge, that has happened a few times for the one year of me owning it. As usual I let it charge, but it would just show the red battery charging sign and not turn on for hours. I went to the apple service and they told me it out of guarantee because it’s bought on a firm name and i have to buy a new one. Imagine buying a 1500 dollar tavlet every year and a half. Two months later the same thing happened to my fathers iPad Pro that was bought a few months before mine... what should we do? It’s bought in another country and now he has to fly over to get a new one, because it needs to be in the same shop it was bought. Isn’t it strange how both iPads died in the same way? The iPads are both under two years and now we have to buy new ones... guess we’ll switch the brand.