Premature line cancellation

I did the online cancellation on Telkom's Portal. On there you can choose the date you want your services to be cancelled/terminate. I choose 30th June 2019 as I am moving 1 July 2019.

The back office technician who processed this order paid no attention to the termination date and cancelled my line on the 11th of April 2019 ( however my bill period for march is 24 Mar 19 - 23 Apr 19) of which I am still being billed full price for.

I have been on the phone with 10213 and 10210 everyday with a different story with each being escalated too a manager and being promised my services will be reactivated in 24 hours. It has been 8 days. I am still waiting on a call back from a manager or someone that can actually escalate this sufficiently.