A/C will not take refrigerant

Hello,

Quick question. A/C system has never worked since I bought the car last year. Took the car to a shop to get the system vacuumed and add refrigerant, and after the whole process has been complete, we turned on the car to test, and nothing happens! A/C clutch engages perfectly, but nothing happens with the gauge readings. We noticed there was no circulation in the system. What do you think the problem might be?

Thanks