Mtn very poor service

MTN ****** ******. I app**** for a Sim contract and received it on the first week on February, the Sim wasn't active for a week. I called them and was told my Sim wasn't rica'd and I was asked to leave my details so they can Rica it. 2 weeks down the line I get an invoice of R500. I call them again telling them I won't pay for a service I haven't used and they tell me my Sim was Rica barred and they will transfer me to another department. I wait on the fone for so long with no response. Another lady tells me that il have to pay that amount even tho I never got to use the service. Very poor service. On top of paying for a service I didn't use I have to pay cancelation fees. I had to buy data all month long and still have to pay mtn for nothing.