Incorrect debit date, double debit and bank charges

Good day,

On the 03/12/2019 I called Discovery Insure to change my debit date for December (my salary is paid in early) and I spoke to a consultant called Jane. She informed me that she has made the arrangements and has logged it into the system and she also explained that since the debit will be done early, she explained that pro-rata for January will added and I was fine with it.

20/12/2019 there was no debit and I called Discovery Insure on the 21/012/2019 and spoke to a consultant called Charles, he informed me that the debit date was not updated on the system. He escalated my matter to his supervisor and he informed me that on Tuesday (24/12/2019), they will do a "false" debit on my account and gave me a reference number.

The debit did not go through on the 24/12/2019 then on the 27/12/2019, I had a double debit and do a reversal for the second debit because I did not trust that Discovery Insure will promptly refund me (based on what they did to the debit) and I incurred bank charges for the reversal.

I am not happy about my service delivery and bank charges that I had to pay for.