Best Ac Tune Up in Mesa AZ

I called your office for the price of a service call for a plumber and I was told there was no charge at less we do the work and you accept the price .
I had a compleate faucet set for my bathtub waiting and a bathtub faucet spout waiting.
I was told that will be $585.00 to replace the whole set. I said no to that and ask how much for the faucet spout? Your plumber said : I'll probably won't charge you for that I appreciated and said Ok just put the spout.
Then he said that it was $185.00 and asked me to signed. I was completely surprised because all he did is remove the hose that was connected to the water and put the spout on.
If I had not called to ask for the price of the service call I would blame me for not asking questions. I was told by your office no charge if I didn't accept the work. You plumber said no charge
How, then, I ended up with a $185.00 bill?
I feel that it was very deceptive in your part.
Sonia Schneider