Nice picture. As I’m sure you’ve guessed, it’s lacking the entire boost circuit: this is a simple, cheap, and low-end DD driver. It will only function with Li-Ion.
I’d tell the seller about the problem (wrong driver, not AA compatible) and let them know you are not satisfied. (And let them know what you consider a good solution. Generally somewhere between a partial and full refund depending on exactly how unsuitable this problem makes the light for you.)
I don’t have a source for drivers cheaper than replacement flashlights. The SK-68 is widely available and mostly comes with the proper driver for around $3-4. Then again the light you purchased may usually come with the proper driver, I certainly don’t know.