Same here. One solution is - sleep sooner. Force yourself to sleep an hour sooner than you regularly do. Also, tell yourself before you sleep that you’ll wake up at the same time you usually get up. Say it out loud, not just mentally.

Once you do these, your mind will be alert to wake up sooner and will actually try to wake you up whenever there is a disturbance. Also, the added hour of sleep will help you long term.

There may be loads of extenuating circumstances- kids, work pressure, your spouse wanting to spend time with you. Make a deal with them. Say you’ll pick up extra work around the house or spend more time with the kids or for work. Whatever it takes. In a few months time, you won’t need the extra sleep. But your mind will be more alert.

Hope this works for you. It did for me for the time I did it. Then I slipped and I again can’t wake up no matter what. I do wake up if someone calls me when I sleep sooner though. So that’s nice to retain.