Can you give a business a negative rating for customer service?

Here I am re-writing my review because it was removed. I want people to know that VOX sucks. I promise to this time not name anyone. This is my story. I moved my line to a new premises and people who are with VOX will know that they don't move the router. They give you a new one. I received an email with instructions on what was to happen with the old one. I work in an industrial area and travel with a lift club. In the email they stipulate that you must sent back the router via Postnet or if you don't have one close a pick up can be arranged. I emailed them, not once, not twice, several times to ask if we could arrange a pick up. They did not even bother to answer me. For months I had the router sitting in my office. Then suddenly out of the blue they took R2000 of my account for the router. I contacted them. I was told to sent the router back and they would refund me. This was 06 Nov. I did this and also informed them that I did email them in April 2025 regarding the return of the router but without response. I got a very snotty response, and I had to refer to the email. Seems they don't know their own policies. The accounts office will not accept the proof of delivery of the router by a reputable courier., and therefore will not refund me. So I am out of pocket and out of a router. Thus I am down +- R4000. They don't respond to emails.