Contract cancellation taking tooooo long

I paid vodacom cancellation fee of R1983.74 on the 20.03.2015,I email the cancellation quotation ,ID copy ,and proof of payment back the same day to vodacom,and I received the auto-reply.Tuesday I realized the contract has not been cancelled as yet,I called vodacom to follow up,I was told that the documents I sent are not showing anywhere on the system and it's not them it's the administration department that is taking too long,today I sent the documents again in the morning ,never received feedback,I called them in the afternoon,only to be asked,where did you sent to documents as they are not showing again,When I asked to escalate and speak to the team leader,I was put on hold for more than 10 minutes,then the consultant hanged up.What is irritating is that everyday you call ,you get a different story and yet the cancellation quotation states that as soon funds are reflecting on their system the cancellation will be processed.In order for me to cancel the contract must I run after vodacom everyday for them do what they get paid to do ,I have left vodacom for the pathetic service they give ,even after cancelling the contract I'm still receiving the pathetic service.