SingleServerIRCBot - TwitchBot doesn't work with commands like /ban

Hello, I'm working on a TwitchBot that should be able to use / commands like /ban (or .ban). It responds to stuff like !test. However it doesn't seem to like / commands. I have found nothing except "Has your bot permissions? Is the token correct?" This does not help me since it has all of the permissions it needs.

I also tried to use connection.send_raw() or connection.privmsg(). The privmsg() thingy works for normal responses so I thought it would for /ban etc. too but it doesn't.
Idk if I misunderstood something when sending / commands but I assumed I could send /ban <username> the same way as a normal response.

Heres the code that gets executed as soon as a message appears in chat:

 on_pubmsg(self, connection, event):
        message = Message(event.arguments[0])
        with open(self.commandFile, "r") as c:
            commands = c.readlines()
        
        if message.message.startswith("!"):
            for command in commands:
                command = command.rstrip("\n")

                cmd = command.split(";")[1].rstrip(" ")
                if cmd == message.message.split(" ")[0].lstrip("!"):
                    if cmd == "add":
                        prefix, cmd, response = message.message.split(" ")[1][0], message.message.split(" ")[1][1:], message.message.split(" ")[2]
                        newCommand = "{};{};{}".format(prefix, cmd, response)
                        if newCommand in commands:
                            self.msg = 'Command: "{}{}" --> "{}" already exists!'.format(prefix, cmd, response)
                        else:
                            self.addCommand(newCommand)
                            self.msg = 'Command: "{}{}" --> "{}" was successfully added!'.format(prefix, cmd, response)
                    elif cmd == "play":
                        sound = message.message.split(" ")[1]
                        try:
                            self.playSound(sound)
                            self.msg = 'Played sound "{}"'.format(sound)
                        except:
                            self.msg = 'An error occurred while trying to play: "{}"'.format(sound)
                    else:
                        self.msg = command.split(";")[2]
                    Message.send(self, self.msg, self.channel)
                    break

        elif self.randomBanWord.casefold() in message.message.casefold():
           self.ban(<username>) # didn't implement the getUser function yet so I just enter the username manually for testing


    def ban(self, username):
        Message.send(self, "Entered ban function with username: {}".format(username), self.channel)
        self.connection.send_raw(f"PRIVMSG #{self.channel} :/ban {username}")

And here is the Message class:

 Message():
    def __init__(self, message: str):
        self.message = message

    def send(self, message: str, channel: str):
        self.connection.privmsg(channel, message)

It feels like my bot doesn't have permissions for banning or using other / commands even though it has every permission I could give it...

ChatGPT also only tells me stuff I already know. I have no clue what to do at this point. Should I switch to pytwitchapi? However I never really understood async functions so I used the IRCBot.

Ping me please if you respond (Unless the post pings me automatically when someone responds; I have no clue how the posts work).

You can answer in English or in German.
Any kind of help is appreciated!