Unable to cancel Voice Line

I have moved to Fibre and have cancelled my ADSL line with Mweb. I have phoned 10210 to find out how to cancel my voice line. I was advised that I can only do it online. When I try to do it from my online profile there is no option to cancel my phone line. I can only amend the name. I need assistance to cancel my phone line as the Telkom contact centre could not assist and I am not sure how else to get support from Telkom.