Hi Jack and Alice,
There are companies which make repairs like this but you can probably do just as good a job yourself and save money.Try to level the existing caulk job (remove excess caulk from outside of crack).Reapply new caulk to fill any voids if there are any.The rest is a matter of paint which will match the wall color without damage to the material or you may find that just smoothing the caulk is acceptable.