Zero customer service at Telkom

In May 2019 I took out a telkom mondo contract for R139 over 24 months. Upon receipt of the Sim card and router I realized that there was 2 Sim cards which didn't make sense, I called telkom so that they could explain what the 2 Sim cards were about I was told not to worry about the second Sim card. In June 2019 the instalment was higher than the contract amount, I contacted telkom and I was told about value added services that I was never told about and I never agreed to. I requested that they cancel those services, I received a case number; that was on 26 June 2019 to date I'm being charged for services I didn't agree to. Both the call centre and the stores are unhelpful. I'm literally being sent from pillar to post.