SIM CARD NETWORK

<p>I was delivered a sim card and that gave me problems (6 months ago), it never worked so they delivered another one a month ago. this one also doesn't work I have called on numerous occasions and all the time a different story. Can some one please help me sort out this problem as I have been paying for this sim card for more that 6 months. I am only a cleaner at the company and do not earn a big salary to keep on paying for something I cannot use and I have to call from another sim card all the times which is expensive for me. </p>