Standard Bank Mobile website is not working as it should

I decided to sign-up for a Standard Bank Mobile fixed LTE device being a cheque card holder. In October 2021 I chose to select the 100gb bundle via the mobile website. Immediately after realising the 100GB was not needed I cancelled via the same screen. System said it was being processed. Now, me being naive and thinking that business have my best interest at heart i forgot about this and went on about my life... Fast forward to February 2022 and I notice an amount I've never seen before on my banking app SBMUsage for R419. Alarm bells went off, thinking it was a malicious D/O and then I see it has been a monthly occurrence since October 2022 which lead me back to the Standard Bank mobile site to the bundle page with the same cancellation still being processed. I alerted this to the service centre agent via the chat and the bundle was only cancelled in first week of Feb 2022. Now, when I query why the system didn't complete the request back in October 2021 and any mention of a refund, I get the run around from the service centre agent on the chat and unwilling to escalate the situation with a more senior member.