Good day My Mom whose ,cell no :*** ,has had an insurance issue since last year October 2022 with Vodacom,She cancelled an insurance contract in October 2022

Good day My Mom whose ,cell no :*** ,has had an insurance issue since last year October 2022 with Vodacom,She cancelled an insurance contract in October 2022.The issue has since not been resolved up to now.Her number keeps on getting blocked due to the insurance not being cancelled and being billed continuously.She’s been passed from pillar to post with no resolution.The Vodacom consultants never take any responsibility .My Mother is an elderly women who also has health condition ,this issue is really stressing out as none of your consultants want to resolve the matter .We are looking at going to the ombudsman as this is really not fair . Can someone help with resolving the matter .