Temp. gadge goes up to hot when idling ex: sitting in drive thru, long light.

What is your question?

Took my car In auto repair and they replaced the fan and radiator, nuts bolts frozen per auto shop and could not get fan off radiator. So had to buy radiator. Per auto repair car is overheating all the time now after replacing radiator and fan, thermostat and suggested a water pump and timing belt. Went ahead and replaced both water pump and timing belt as well as the thermostat. Still overheats all the time now. It did not overheat when driving , now it does and is in worse shape now than when I dropped car off. My only problem was my temperature gadge went up to hot when sitting still example sitting in a fast food drive thru, as soon as I took off , the temperature gadge would go back down to normal . There was no indication of my car being hot ,was not boiling over, no smell coolant fluid, no smoke. A thousand dollars later , I cannot drive my car at all now and had all these parts replaced and out 1,000 dollars . Shouldn’t they make this right? What could be the issue?