Difficulty to cancel contract with Telkom - no assistance!

I wish to cancel my contract with Telkom. My contract ends on the 1st of September 2018. I have been trying to cancel my contract from last month however there is a technical issue and now Telkom tells me i must give them 30 days notice or else i will be charged penalties. i explained to the call center agent of this problem only to find that i cant get a reference number nor can i speak to a manager or supervisor and this means i will only be able to cancel my contract maybe mid August or end of August and that means i must pay Telkom penalties for a technical issue on Telkom behalf. I would just like to warn everybody that have telkom contract to make sure you cancel well in advance. Get proper dates and referance numbers else you will be stuck paying for the contract when its not even your fault.