So my question to you is where do I go from here?
Back to the school to the Financial Aid Office. The Registrar's Office likely has no record of you because you withdrew from classes. Financial Aid may be a whole different story. Did the school receive the money from SM? If so, did you withdraw before the required date in order to receive a full refund? Many students incorrectly believe that all they have to do is withdraw and all the tuition is waived. That is true to a specific date set by each institution. If you did not withdraw by the specified date you owe the tuition even if you never attended one class.
If any of the money was refunded to you because you borrowed more than the tuition then that too must still be repaid.
However, check what you signed with the school. This "school" is notorious for billing fraud and requiring payment regardless of classes attended. If you agreed you would pay for the first semester even if you didn't attend then you are out of luck and owe the money. However, if there is no such agreement or contract and the school was paid when you properly withdrew then they need to straighten this out with SM and return the money.
"That's just my opinion, then again I might be wrong." Dennis Miller