Distrustful and at a loss for words regarding the behaviour of Afriforum

I have been an AfriForum member for a few years, and they regularly phone me to ask for a donation increase. This month, they increased my donation without my consent. As this is a donation and not a subscription, this has left me very distrustful of them.

When I queried the increase, I was told that an SMS had been sent to me advising me of it. Maybe I'm wrong, but since when can a donation simply be increased like this?

After the abovementioned I have cancelled my donation to them and would caution people who donate to them monthly to double check the debits.