There are lots of people that are advertising themselves as locksmiths when in fact they have no training and no interest in helping you at all. There only goal is to take advantage of you and take your money.
We all lose our keys. On average we lose things 9 times a day, so it is reasonable to think that our keys will be lost a number of times during the year. It is a fact of life that we will all be inconvenienced by a set of missing keys at one point or another.