Telkom **********ly withholding my refund - still waiting for resolution

We terminated all our services with Telkom on 30 September 2017. Paid our account up until 8 October 2017 as per August 2017 invoice. Telkom IN ERROR only cancelled our landline and not our ADSL at 30 September. Due to the error, Telkom then further increased the ADSL rates and Telkom **********ly without our refund for services paid in advance.

In previous enquiries with Telkom before we cancelled the account, we were assured that the difference will be refunded to us. Since October 2017, Telkom inclusive of the social media team is unable to resolve this matter and we are still waiting for someone from Telkom to contact us and resolve this issue. It is now almost 8 months that I have been following up with Telkom and really struggling to get this sorted.

To whom can I escalate this to? This is highly unprofessional!