CANCELLATION OF 8TA CONTRACT

My 2 year 8ta contract was due to expire 01/11/2015. On 05/10/2015 i emailed a request for cancellation to [Email Removed] requesting for cancellation eff 01/11/2015. I followed up on 29/10 and 02/11 via email to the same adress. No response. Without any phone call or notification from 8ta asking me to upgrade my contract due, my recurring monthly fees were increased from R269pm to R456.50 WITHOUT MY CONCENT. I contacted 8ta callcentre and spoke to several agents. On 03/11 \ Rolanda"Voicelog 10h27. 06/11 \""Stella\"" Voicelog 11h08. 10/11 \""Pal\"" Voicelog 10h00 and today \""Thobile\"" Voicelog 10h58. During all these calls i got the same answers... Where did you send it to... when did you send it...We will give it to the cancellation department...the cancellation process takes aprox 30 days... We will open a case.. your case nr is ***2. With every call i requested 8ta to phone me and give feedback. Even the team leader \""Charmaine Ma***o\"" was supposed to call me when i spoke to \""Rolanda\"" but i still wait for her to call me. The upgraded recurring monthly fee of R456.50 is now due for 31/11 and I wil not pay that amount because NO CONCENT was given from me as the account holder"""