POOR SERVICE! 2 weeks without any contact back!!!

I have been trying to cancel my services with Telkom since the 1st of December. I called them and they say that i cannot be transferred to the cancellations department as they ONLY work via email. I received a call on the 2nd but received a voice mail to resend it for assistance. Since then i have been sending the SAME cancellation email everyday since the 1st of December to try and get the line cancelled. I was also informed that December has been credited due to being over charged 2 months ago and only now sorted out. Today i received a new bill for end of December. I will NOT pay this bill due to your negligence for not contacting me back to cancel the line end of December with the 30 days cancellation notice. I have given notice with proof thereof but have not been contacted back. This is your fault. CANCEL MY SERVICES. Super POOR service from a national service provider!