I'm tired of being treated as a key without key pay

I used to be a key, I left came back and requested not to be one because I can't handle the stress. I also knew that working mornings, that I would have to work alone if I was key. I don't feel exactly safe here as I was assaulted by someone here before.

Well one of the girls at nights crashed her car and doesn't have a ride to work. She lives too far/unwalkable road to walk to work. So for the last 3 months the last 30-40 minutes of my shift I'm alone when the key/sm/asm goes and gets her. It would be one thing if it was 10-15 minutes like it should be, but it's usually around 30 and thats because they go get food before she comes in. This is the busiest time of the day for us.

My register still has me as a key, so they don't worry about that, but being left alone isn't the only thing they are doing. I also do damages, ohas, literacy fund, ect. I cover night shifts when someone calls in and then open the next day. No one else does this. Now tonight I have to be acting key for 4 hours by myself because of people quiting and having to kids stuff. I have no access to the safe and no keys. So if I run out of money I'm majorly fucked. I'm really trying to aim to be here for 2 years, but it's getting really hard.

I like the people I work with but damn its really hard to keep liking this place. It stresses me out to the max.