Bad service at Game

On 21 September 2018 I tried to close my account at the Worcester Branch in the new shopping mall. I was told over the phone that I will receive a sms once the account was cancelled. Afterwards I realized it was not done and I still have to pay the monthly account fee, without using the account any longer. Friday, 19 October 2018 I went to heated Game in Parow Centre. Despite holding on on the phone to the head office in a shop without air condition the phone was just ringing on the other side. The same happened Sonday , 21 October 2018. What must I do to get my account closed after all my attempts.