Walmart review: service is horrible

I am boycotting Walmart after a horrible experience.
We go through coupons, ads and make a list of what we want. Get to checkout, tell cashier "We have coupons and are matching" Shes like "well i need to see the ads" A customer from the next checkout was like "Oh I do couponing also, your store policy says you don't need to show the ad" My cashier rolls her eyes. I figure shes a older lady, and I'd be nice and show her the ads, which on everything we got I had to go through Albertsons AND Kroger ad to find what she needed. Get to coupons, and mom, who wasn't feeling well handed her the envelope, which ended up being the wrong one. Our bad. But she starts scanning them and had a attitude the whole time. She was mad cause she was suppose to leave, but had a line (People kept coming even after she turned her light off.) She came to the V8fusion coupons, which is when we figured out we gave her the wrong envelope. We had 2-1.5 off one V8fusion and 1 coupon for buy 2 v8 fusions and get a tea for free. The register didn't want to accept the 1.5 off coupons, I tried explaining how it went but shes like "well the registers not accepting them and theres nothing I can do. She refused the gum coupons and argued about what it said. I finally said screw it, finished with her and went to customer service. Told her what was going on, and she had a blank look on her face. She DID say we were right about the V8 though. She tried to tell us the registers only allow up to a certain amount of coupons. I asked "how many" she was like "I don't know" so I said I only used 20 coupons, most places its up to 100 coupons or like 500$ and I only spent 150$. She had no idea what she was talking about. She also didn't call over a manager. So I told her I wanted a refund on the juice and gum. It was almost 20$. I was so mad. Spent a hr in line and had to put up with rude people. NOT going back there. Match prices my A**. Worse experience in a long time!