AIB's merchant service charges will appear as MSC on your statement under section 'C' as shown in the guide below. You can access your merchant statements on AIB insight.
https://insight.aibms.com/mop/faces/login/aibms/login.xhtml?acquirer=aibms&language=en
If you are a new merchant, AIB will send you a link directly to set up your account. This typically happens within a month of joining Blink. To learn more about how to understand AIB merchant statements, please follow this link: AIB – statement guide https://www.aibms.com/wp-content/uploads/2021/06/Statement-Guide.pdf.