Yes, take the car to either a Volvo familiar body shop, or a Volvo dealer. There are “interlocks” involving the ignition switch and transmission to lock the shifter when in park. A body shop might be familiar with the system as it can become damaged in an accident. Otherwise a dealer can troubleshoot it. I don’t think a general mechanic can help you unless they are very experienced with older Volvo cars.
Was the car in an accident?