Distressed by vodacom due to abuse to elderly people

I have a had a terrible experience with vodacom accounts department for the past 2 years my mother who’s a pensioner has been trying to cancel her contracts and did not get help. Instead when she tries to cancel by calling the cancellation department her accounts are either migrated or upgraded. This has caused so much distress on her since she can’t afford to pay all that now that she’s not working. When we phone they push us from pillar to post, I’ve sent emails to vodacom they respond with an automated message with a reference number promising to call. As we speak now my mother is sick with hypertension because of financial stress. Today we called vodacom legal they sent us back to cancellation, they tell us they can’t help us. To be honest I find this as financial abuse to the elderly that can’t defend themselves.