Pathetic Vox after sales service - UPS Device

This is beyond frustrating dealing with Vox. I have been in contact with Vox wrt the cancellation of the UPS device and was supposed to be refunded the premiums I paid and to date I have still not heard back from Vox since my initial email on 16 May 2022. I have followed up telephonically and was told that I would get a response via email and still I have not received anything!

The faulty UPS device is still in my possession and I am being billed for it even though it should have been cancelled from inception.

Now my VOIP line has been suspended as a result of non-payment when in fact I should have a credit balance available because of the pending refund due to the faulty UPS!!

I refuse to pay Vox a cent more! The faulty UPS device must be collected as a matter of urgency and my VOIP line needs to be re-instated while the remainder of what I paid towards the faulty UPS must be refunded to my bank account as stated in the email I sent to Vox.