Telkom cancelation

I had an LTE contract with Telkom and recently cancelled the contract with effect from today. I was under the impression that the SIM would continue as a prepaid line, as I was not advised otherwise. I then went and bought a 10GB LTE bundle @ R249 last week. Today, I get home and there is no data and I can't access the account online. I started an online chat with Telkom and was informed that the SIM had been deactivated and all my remaining data was lost. I said that no one informed me that the SIM would be deactivated during the cancellation process. Before my query could be resolved, the agent, Mduduzi Ndlovu, terminated the chat.

I want my SIM restored and my lost data refunded or I will lay a complaint with ICASA.