Anyone tried to upgrade ideapad 3 15alc6 to 20GB/24GB RAM?

I purchased laptop for my chrome tab loving mother, thinking i got 8GB onboard and no RAM in SODIMM, turns out it was 4GB+4GB...I know product page shows that i can only have 12GB now max.But some ram manufacturer pages state that i can go 20GB and even 36GBHave anyone actually tired that?Would be a waste of money to buy and fail