Bad Agent from the Bank

i recently made an online purchase (once off) with my new Capitech account to a site (15 Apr 2025). Little did I know that they would again deduct money the following month (end May 2025). I then report the second transaction to Capitech as unauthorized. An agent calls to shout and argue that im the one who put my banking details on that site and Capitec will not be able to reverse the second transaction. I have been an FNB customer for all my life and never experienced such disgust from a Bank Agent.

i truly tried to explain to the Capitec Agent that the second transaction is unauthorized because the first transaction on the 15 Apri 2025 was authorized by me as a once off. i was not subscribing to anything, it was simple a once off online purchase. If this matter cannot be resolved, i would close the account and continue with my FNB accounts.