Account History Error Message: Unavailable

This past September, I contacted AT&T to request that my account be changed to AT&T PREPAID to sign-up for the $25/m ($300 one-time payment) plan. To this day, I still don’t have access to my account history logs, such as phone calls, etc. I receive an error message, and of course because of the extremely limited support and contact with higher tiers in the company, I haven’t received an answer or solution. My current theory is that maybe it won’t process my account history until the full year has lapsed, but even that still doesn’t seem right.