Shoddy service from Supersonic

On 10 February I wrote my first review on Supersonic. 1. I received a call from them apologising profusely and promised to get cancellation dept to send me an email setting out all the wrongs they were going to make right. 2. Received the email stating that a credit has been done and sent to the billings dept to approve. 3. To date they are still awaiting approval from the billings dept after me emailing them every so often. I then got an email from another faceless person saying they will only give a credit once the router has been collected. BTW the router was collected 2 days prior to me receiving the email. 4. When I mentioned it to faceless person she acknowledged that it was indeed received and I would get my credit. 5. This morning I received an invoice for R250 for cancellation of the router. 6. I've returned the invoice and they've since opened a ticket disputing this latest invoice. 7. No mention of the credit note that's been promised over and over and over again. This is the worst company I've ever dealt with. This issue is been going since 29 December 2022. Pathetic, shoddy service is all they give. I can't stress enough my anger and disappointment in this ****ty company.