Cancellation and Refund - Still not actioned

Since 15 December 2021 when my internet connection was activated I was in contact with customer support and technical support, as it did not work for the intended work purpose. On 30 December 2021 an agent finally confirmed that it will never work for the intended work purpose - and I immediately requested to cancel the agreement. I was assured no further billing will happen and that I will receive a refund. On 02 January 2022 an agent advised that I will receive a call on 03 January 2022 to discuss the collection of the device - based on the ticket I raised on 01 January 2022 - wanting a status of my cancellation request. Up to today, and after even more regular contacts with agents from the company - NOTHING has been done and no feedback provided.