Cancel of old contract and Capping of data

I tried to phone *** to cancel my contract that expires 3 July 2015. The number just kept on ringing and I decided to send an email on 2 June 2015 to customer care, requesting them to cancel my contract. Vodacom responded to my email on 2 June 015 reference number 000Y~Y3C8 and said they will contract me within 24 hrs. I've had no further response from Vodacom.<br> <br> Second problem is a took out a new contract 01 June 2015 from Vodacom Makro, Alberton, Mobile Wi-Fi 2Gig pm at R99.00 pm. I also emailed Vodacom customer care on 2 June 2015 requesting a sim card no, capping my contract at 2 Gigs or at least sms/email me when I've reached my cap of 2 gigs. Vodacom responded to my email on 2 June 2015 ref no 0040~093B and said they will contract me within 24 hrs. I've had no further response from Vodacom.<br> <br> I can't take the chance to email any personal data via email, because of all the ***** cases relating to the electronic systems.<br>