Bad MWEB

I received a sim card from MWEB 2 months ago and we tried to activate the sim card the sim card never worked. I called them more than 5 times and every time i call we spent more than 20 minutes on the phone and im using my airtime. They told me that the MTN network is down they will contact me once is back. They send me a SMS to inform me to call them because the network is back, i called them but sim card never worked again. Always when i called them they come with stories but the sim card still not working. I end up stop calling them because im using a lot of airtime but sim card not working. My last call to them i told them that because the sim card is not working let's stop and cancel the deal because im loosing a lot of money to call them and they don't know what is wrong with sim card. Now they want me to pay them R1000 and i don't understand why because they didn't give me any service that I required from them. They said they handed over me to legal team