My Contact Cancelled 2 Months Ago and I just received A Bill - Terrible dishonest service

Vodacom you are trying to get my name blacklisted. I cancelled my contract 2 months ago. It took me 4 months to cancel because contact centre either does not know what they doing or are being dishonest. When I rep**** to the email the invoice was sent. Gave me a bit. Bot told to add number, says it's invalid. Spoke to Vodacom on Facebook. Now they are ignoring me. This is the worst service ever. You can't do this to people. I asked for an email numerous times but still nothing.