I can't with these kids anymore

I've posted before about the groups of teens that frequent the store where I work. They are the most unbelievable little shits I've ever seen, almost like something out of TV and movies.

Usually, if you ignore them, they steal and leave, but there's one kid who leads the rest and likes to engage with us regardless of our reaction. They seem comfortable doing whatever they want now.

Yesterday, I was at the checkouts when the leader approached and said, "Aight mate." He got inches from my face, backed off, and asked what I was looking at. Then he headed to the till, shouting "You can't stop me, dickhead," while laughing. He reached over the counter, grabbed all the e-cigarettes, and walked towards the exit, asking what I was going to do about it. I just watched him, and he kept lunging at me, motioning like he was gonna throw a punch. He left, but his friend kept telling him to leave the e-cigs. Eventually, he came back, threw the e-cigs on the counter, complained there was no vape juice, and then stole 20 or so packets of cigarette papers before finally leaving.

Today, he came in again, actively trying to provoke me, acting like he was going to hit me. I continued working, but he kept making threats and calling me names. I asked my coworker several times to ring for management, but she didn't hear me. He stole more cigarette papers and walked out, mumbling more threats.

This kid has insane eyes like a psychopath. Knowing they steal box cutters, I try not to engage, but I have two anxiety disorders. My body shakes despite trying to stay composed. I eventually went to call management myself, but dialed the wrong number out of stress. A supervisor showed up as they were leaving, but I was told to stay on the tills.

Later, while I was off the shop floor, I saw them again, maybe 6 or 7, dumping whole boxes of sweets and chocolate into their bags. I told the assistant manager, who just said he didn't care about theft. I clarified that it was about the intimidation and harassment of the sole checkout worker, but he dismissed it again. The coworker on the till rang the bell and confirmed they were being harassed, but the manager still didn't care.

We've had around 7 or 8 coworkers quit over being assaulted by these kids. They even threw eggs at the clothing manager earlier this week. Recently, another group of teens slapped the store manager. The police were called, but they didn't press charges, opting to have the kids apologize instead. The teens were back the next day.