Global Blue Tax Refunds Missing

I used Global Blue for a tax refund on 20 August 2026 in Mykonos. I was expecting two separate tax refund amounts of EUR 43.90 and EUR 73.40 to be paid into my NatWest bank account. Global Blue informed me that they have processed the refunds and provided me with an ARN number. However, my bank has confirmed that these amounts have not been received and has also stated that they cannot trace the transaction using the ARN number given. As a result, I am stuck going back and forth between Global Blue and my bank with no solution. I request that Global Blue either immediately refunds the amounts of EUR 43.90 and EUR 73.40 to my NatWest account, or provides a clear and workable solution that ensures I actually receive the money without any further delay.