WebAfrica is a no go

I left WebAfrica (best decision ever) in April 2020 after joining them in November 2016. My router was free according to our contract (WebAfrica admits to that as the contract was closed in 2016). Yet I still get constant demand emails for this router, which they are welcome to fetch. I spoke to Zoliswa on their helpline on the 11/05/2020 and a note was put on my account to this extend, yet the emails continue. I will now have to check my statements and do a reverse as I am sure they will bill and *******ly deduct the router cost from my account. And this on top of bad service.