debited without consulting client

In November, a technician was sent to look at alarm as a problem was noted to adt. In Feb an amount of R228 was debited. This was not communicated prior to technician going out. my mum then called the pmb office and queried this with a manager who then told her it must be paid as it's ADT policy. This was done in November but we get debited in Feb and she only received the letter stating the debit this week. my mum is a pensioner. There was never a premium missed . and it's disgusting receiving service like this especially when she was not made Aware of the cost prior to the technician being sent out. I would like this premium refunded. really disappointed at the service.