I need help with rent, recently lost my job

I recently lost my job at Walmart, I was there for 6 months busting my butt I trained over 10 new associates and never got told I did a good job,  I would finish my isle a few hours before it was done and never got told I did good that place killed my motivation and drive, I would get constantly yelled at about how slow I was but at the end of the day I would get my job done, my first coaching was for talking to my mom when she was in the hospital, my second coaching was for being unproductive, let me explain that situation, I was assigned to down stacking groceries this particular day well the truck didn’t show up till almost two hours off of schedule so we were already two hours behind, it was me and one other associate that was assigned to downstack 8 pallets on our own with 4 carts it took us another hour to finally get done so we are 3 hours behind now, I took my first break and as I’m coming back I get a call from a associate who needs help unloading the GM truck so I go and help him and that took almost 30 minutes, the managers seen me and didn’t say anything. 

so finally I’m able to start my isle I get most of it done then go to lunch when I get back I go straight to my isle before I do anything because I know we are behind today when I’m almost finished the co-store manager just stands at the end is my isle and eye balls me down then walks away after a few minutes next thing I know my manager comes over and tells me that bossboss is upset I’m not done yet, knowing we arehella behind I tell him the situation and he saysI know it’s stupid but he’s complaining you should be done by now you only had two hours I’m like dude we are like 3 hours behind of schedule right now, the next day I get coached for being unproductive. 

now this is what gets me fired, keep in mind they have been wanting me gone they been writing me up for stupid things, so as I’m leaving I’mwalking out of lawn and garden I hit my vape the lady watching the door tells me I can’t do that, I tel her I didn’t know I seen people smoke here all the time and no one has ever said anything about it to me. A week goes by I get called into the office and I’m being fired, she told them that I was being disrespectful and arguingWhen I had a coworker there next to me who witnessed the entire thing they talked to him and he proved I wasn’t lying I was being respectful and I still got fired. I should have my job stillthe store manager promised me she would getrid of my second choaching because it should of never happened come to find out she lied tome and never did so I got fired when I got coached I should of been on red not being fired,  I been looking for a job for about a month now but no one will hire me since they know I got fired please help I can use anything you’re willingto spare.