Telkom refusing or unable to cancel service.

Never ever ever sign up with Telkom. Find the required service elsewhere. I had a ADLS line with Telkom and moved to a new house in December 2018. They keep invoicing me despite me trying to close the account for the last 6 months. This is affecting my credit score. The online self-service portal is also not allowing you to cancel the service. Telkom WAKE UP!!