If you have a snowflake button, you should have aircon. Without aircon button is either not there, or a dummy, with no logo.
Look under bonnet.
In front of the cooling radiator should be another one, which is the aircon condenser.
On teh front end of the engine, the auxiliary belt will also drive the aircon pump, heavy lump similar in size to the alternator, with two pipes from it. Follow those pipes, one goes to the front rad, the other should pass into the bulkhead for the cooling rad (evaporator) inside the heater box.
If it does not work, could be out of gas, it slowly escapes and needs re-gassing every 3 years or so. Or there could be a leak. Any competent garage should be able to evacuate and leak test the system before re-gassing.
The gas also contains a small amount of oil to lubricate the seals and pump. If it has not been used for some time, the seals may have dried out, meaning new seals at every pipe joint, and/or a recon pump, so have it estimated before going ahead.
Recirculate button should still work.