Unwanted and irrelevant subscriptions *****ing form frail, elderly pensioner

My 82-year old mother-in-law asked me to look into her Vodacom bill that seems to be quite high - despite us assisting her during the lockdown period to change her subscription and terminate the payment for my deceased father-in-law (which she paid unknowingly for two years after his death). A friendly assistant looked at her cellphone usage, and helped her migrate to a cheaper package - giving her just over double her usual minutes used per month. BUT: She constantly paid more than expected for her contract. Her invoice states nothing about minutes used (hiding the more than 200 unused minutes and 390 unused sms's that she pays for in her contract) - and she also pays R217 for "Add to Bill - Other". That turned out to be a "subscription" for "PM Connect - Xfitness". She has no knowledge of, and zero interest in, Xfitness - but it cost her at least R1500 already (I cannot determine when the subscription started).