McDonalds really messing me around?

Had my second interview on the 2ndh. They said they would call, but they never did. Sent me an email saying they had been trying to contact me and that evaluate I hadn't replied yet assumed I wasn't interested. I rang them up on the day, and they told me they would send me another email. They didn't, so I rang them up on wednesday and the man said that he would take my details and that they would ring me by Friday. They didn't, so I rang again today and they said they would call me back in an hour because they were busy. Again, they didn't. I need a job do badly, just thinking about how much money I could have already earned if they hadn't messed me around is making me feel sick. I am broke, why are they resting me like this's nd what do I do about it? Should I go in the store tomorrow and complain to the manager?

Edit: I'm really sorry about grammar and mistakes, it's 2am and I'm tried and I'm on my iPhone and we all know how rubbish autocorrect is!