you can actually, it's really just hard, so no, it's not impossible. You just need to chip-in damage or just try to hit it on the right time. Then after that, you are basically done. so technically, its the ending
sorry for being 3 days late. after she says "'ll never hang up" you will need to wait a few seconds. it doesn't matter if you miss or not, after the "call" its basically the end.