MTN Network Provider - both thumbs down

I app**** for Wifi from MTN for R250 pm. This was in middle May. To date the sim card has not been activated after I paid the deposit and the first month. On my contract it also states R250 per month, I then started receiving emails that my monthly payment of over R600 is outstanding. I immediately cancelled it via email as I have to give one month notice but now I am still being messaged and emailed constantly. Absolutely disgusted and will not recommend MTN to anyone.