Atrocious service and ****mers

If only could give -1 rating because that 1 star rating isn’t doing me justice. I have never experienced atrocious service from a service provider. Bottom of the barrel if I must say. The terrible fibre network was bad enough that I cancelled my service last year November. I returned the router in December, and they decided to charge me R999 clawback penalty!!! I sent the proof of the waybill and the collection department confirmed but no one wants to refund me my money. I have been taken to pillar to post - OMG don’t get started with the incompetence from WhatsApp agents to finance. I have to explain the same story every single time. Finance department told me they refunded my money to my invoice- confused what invoice when my service is cancelled and all payments were up to date. Meaning they will always owe me a “****” refund.