Disappointed with Santam

I spoke too soon when I rated Santam's service with 5 stars in the past week. Today (22.06.2025) they debited my 85 year old mother's account with the premium for the remainder of June as well as July's premium......this after agreeing that they will debit her account with R 91 for the remainder of June and then debit her account again on the 2nd of July with the full premium for July...........who do I need to contact to rectify this?