Failure to refund and not returning calls

I cancelled my subscription with Supersonic Fibre in September 2022. Considering the notice period AND returning the router to them in October 2022 (which they confirmed receipt of), they deducted an additional debit order which I have been discussing with their agents on WhatsApp since October 2022. Eventually, the subscription was cancelled after I had to threaten them after receiving yet another invoice.

Every month they promise me that they will call me to arrange my refund and NOTHING HAPPENS. They owe me my refund but the billing department simply does not call me back and you cannot contact them directly.

Very disappointed in their service after I cancelled my subscription. Don't get into a situation where they need to pay you back. When cancelling, make 100% sure they record the cancellation timeously because you will not get your money back.