Hmm, just found this
"This aircraft is not designed purely for aerobatic flight. However, in the acquisition of various certificates such as commercial pilot and flight instructor, certain maneuvers are required by the FAA. All of these maneuvers are permitted in this airplane when operated in the utility category."
"In the utility category, the rear seat must not be occupied and the baggage compartment must be empty."
"Utility category maneuvers and recommended entry speed:"
Chandelles- 105 knots
Lazy eights - 105 knots
Steep turns - 95 knots
Spins - slow deceleration
Stalls (except whip stalls) - slow deceleration
"Abrupt use of the controls is prohibited above 98 knots."
Did they tell you the plane wasn't able to do spins?
I'd take issue if they didn't know the limitations of their own fleet, I'd also be concerned if they didn't hire a caliber of CFIs, or rather pay for a caliber of CFIs, where they wouldn't have a issue giving you some spin training.
If you're still early on in your training, I might shop around a little for a different school.