i am beekeeper. if i see a swarm i have to take them, because here in europe honeybees cannot or only hardly survive on theyr own. spray some water on them and then carefully put them in a box. they should not be agressive if they swarm. if you are lucky and you have the queen in the box, the other bees will follow. but it seems you live in africa right.? i am not sure if african bees would like this ^^ maybe next time you put some good clothes on and try and become beekeeper too ;)