yesterday showed me I have a decision to make

So yesterday was Sunday, and I went to church, nothing unusual about that.  Well I go to work at papa johns right after church, and my boss knows I don't get out until after 12 and won't get there until 1230 or a few minutes before.  Well it had never been a problem, until yesterday.  A few weeks ago the person in charge was M, but he got offered a better paying job, so of course he took it, i don't blame him.  But then K took over, and she has always hated me, and I have no idea why.  Well while on my way there, I get a call practically being yelled at for not being there yet.  So I speed to get  there, and once I get there, I get yelled at to hurry up and change.  I'm a delivery driver and there were only 2 deliveries up, and one was still in the oven, and there was a driver on the clock but he was on a delivery.  So I rushed to get dressed.  I come out of the bathroom, and she yells at me to get the oven, and I'm just wondering why she is being so rude to me.  As soon as I get a delivery I take it, and I am quick about it like I always am, but each time I get back, she yells at me to do something else.
Well at 3 the boss comes in, and I got back a few minutes later, so I went straight to work on the dishes.  Well the boss, V comes over and tells me what she need me there by 12 or earlier (I told her multiple time when she asked me to come in after church, that it would be close to 1230 and she was fine with it) but when I told her that there was no way I could be there before 12, she said that she would be scheduling someone else and I would start coming in at 4, that cuts 8 hours out my check.  Plus I am the only driver that ever wants to do side work, so I will get stuck doing side walk while everyone gets in my way.
If they would have talked to me, instead of acting like I was the bad guy because I go to church, it wouldn't had been an issue....but I'm starting to think I am done...I'm not going to work my butt off just to be treated like crap.
 
It makes me really wish dad was here because he was the one person that I could sit down and talk to and he always calmed me down and helped me see the path I needed to take, and now I feel lost.