Lets deduct policy +50% in one month without notifying the client

The for the end of June 2020 sanlam decucted more than 50% additional of my monthly payment for my policy. July an amount of May + 10% was deducted and the payment amount adjusted. Up to date sanlam could not indicate why the increase that was supposed to be done the beginning or March (before the lockdown) was only done in one month for 4 months, resulting in a 50% increase without any notice. Any emails to sanlam would take more than a week to answer - so I assume they are aware that a lot of South Africans are receiving a reduced salary. Emails received would not indicate an answer to my question.