Poor service

I received a call to upgrade but when I want to cancel a data contract, I was unsuccessful. They stated that I will receive a sms or e-mail to confirm that the contract is cancelled but this never happens. It does not help to contact 082 195 because there is no one to speak to in person. It is amazing that they can speak to you to upgrade but not to cancel. Despite what is published on the website the branch simply states that they cannot cancel contracts.