Unfair charges for a router I never received

I used WebAfrica for about one to two years on an LTE plan. When I cancelled my service, all my bills were fully paid and my account was properly closed. I never received a free-to-use router from them, so there was nothing for me to return.

After my cancellation, WebAfrica claimed that I owed them money for a router that I never received. This turned into almost six months of back and forth with their agents. I kept asking for proof that a router was issued or delivered to me, and they kept refusing to provide any evidence. Instead, they continued adding more and more charges to my account and even involved their lawyers, who also contacted me demanding payment.

Eventually WebAfrica gave in and reset my account balance to zero because they could not prove that I owed anything. Even after that, the lawyers still kept messaging me for a while, although they have stopped now, so I believe the situation is finally sorted out.

Despite everything, WebAfrica never apologised or acknowledged their mistake, which I find very unprofessional.