Windowsill repair?

[Edg123]

Hello, looking for recommendations to assist with a repair to a windowsill at back of my property in Camberwell. It?s a concrete windowsill and a chunk has broken off and fallen down, leaving a hole to be filled. There is also some re-pointing that needs doing around the window which could be good to do at same time.

have tried asking a few of the local building firms, but i fear the job is too small for them as most don't reply. Also not sure if this is more a job for decorator or handymam rather than builder?

Any recommendations welcomed. Thanks, Ed