sim card not register over a month

Since I went and do a Sim swap... it's still not been activated. I call the One2One call Centre more than 5times and every time I got told the Sim card is sorted. I even ask to speak to a supervisor and still today no supervisor or manager of the One2One call Centre called me back. I called again and told the agent I want to speak to a supervisor, but he told me he will check if the Sim is sorted and still nothing happen. I'm paying every month for this Sim card and but cannot use it