Unable to get my cancelation done

Did a migration in July online for a home router. I found out that there was no network available where I live so after 2weeks I called to cancel via the call centre. It's now been six months or more that they have still not canceled or gotten back to me regarding the cancelation. After numerous phone calls I am still paying for something I can't use. Vodacom is absolutely useless. The call centre is of no help whatsoever.