Horrific Customer Service

Im very disappointed I have informed you that my Sim 3 was ****** and wanted a replacement last year but nothing was done. At that point the SIM card was not activate. But since last month I have discovered that the same SIM is active and is being used by someone else I don’t know. I have reported this numerous times but you not doing anything about it. I have been a loyal customer but you not even trying to assist. I cannot be paying for something I am not using. Please get back to me as soon as you see this.