Bad experience with audiologist

I have been trialling a Bernafon behind ear set of hearing aids.  I
paid $1,100 deposit and a non refundable $150 fitting fee.  I was told
I could trial the hearing aids for one month.  Where it becomes unfair
is that the molds for the hearing aid did not arrive until the trial
had almost ended.  The hearing aid was not properly adjusted and did
not respond to the remote (L ear),  The battery compartment came off
on the (R) hearing aid.  I really have not had time for a proper trial
but I have to return them and lose my $150 without being able to trial
them properly.  I could go ahead and trial others but because I no
longer have confidence in the fitter - she seemed very inexperienced -
I think I must take these aids back, lose my $150 and just count my
losses.  Itr is a risk if you encounter an inexperienced young fitter
as I did.  I will try to find someone who is experienced - perhaps
older.  Do others have any recommendations on how to find someone I
can be confident in and not lose my $150 yet AGAIN.  thanks for this
wonderful forum.