Hi apowdermonkey!
Welcome to AGL Community!
Thank you for reaching our regarding this, that is a lot of money and I can certainly understand your concern.
This process is designed to get the credit back to those who do not have regular refunds to ensure they do not forget that it is there, trust me sometimes it happens.
It sounds like you have already chatted with our team to get this fixed up, if you need any further assistance do not hesitate to contact us.
Thank you
Ellen