Bad service

On the 14 September 2020 I signed up for Mweb's LTE Internet deal. I bought the LTE router which I needed from Mweb fir R1499. 00. I received confirmation from Mweb that they received my payment and the router was despatched to me. I then cancelled the LTE package as I have received a better deal with another service provider. The LTE router was then returned to Mweb, by the courier company. I then contacted Mweb to ask them to resend me the router. Then nothing happened. So I then asked them for a refund. For three months now I have been battling to either get a refund or for them to send me the router as I have paid for it. The last time I spoke to Mweb's customer service was on Tuesday 22 December 2020. I spoke to Shumela who told me she's waiting for a manager to approve the refund. She then came back and said she could not find the manager, and she will call me back. It is now the 24th of December 2020 and I'm still waiting for a callback. How difficult can it be? Either refund me or send me the router.