Just running the engine won’t work.
This is the bleeding procedure, you can do it yourself at home if you have a 12mm spanner or socket.
Make sure the engine is cold. Don’t try it on a hot engine or you will get scalded and it won’t work properly.
Open the radiator cap. Depending on model, your car will have either one or 2 bolts on top of the thermostat housing. If it has 2, remove the lower one first. If it has 1, remove it and leave the top one. Pour coolant into the radiator. Keep pouring until only pure coolant comes out the hole, no bubbles. There is no harm in pouring extra coolant in to be sure.
If you have one bleeder bolt and you are sure no air is coming out, put the bolt back in and top up the radiator, job finished.
If you have 2 bleeder bolts, once you are sure no air is coming out, close the lower bolt and top up the radiator. Then open the top bolt and repeat the process.
I shouldn’t even have to post basic stuff like this online. Any mechanic should know this. But here in uae there are so many shitty mechanics who have no idea what they are doing but they charge low prices so people run to them even if they don’t know what they’re doing and it’s because of cheap customers chasing cheap incompetent mechanics I refuse to work on cars now. If someone offers me 1,000 dhs an hour to fix a car I won’t do it. If you make your bed you have to lie in it. Competent mechanics who charge for knowledge have negative reviews posted all over google because of price.