water infiltration

Hello . the phone got flooded in the rain even though it was ip68 selective. and if it is out of warranty, a new price is requested for the replacement. there is no trace of impact on the phone. A phone on your website that says it is water resistant for 30 minutes half a meter. how can he get water. I've never been in the sea or pool. Is this the aplle quality? a phone that is flooded in the rain and it is out of warranty. How can you help?