Ivan's Electric Ltd - No Longer in Business

A tree fell on our hydro wires and pulled them from our house. Ivan came on the same day (Friday morning) to five us an estimate. He was here no longer than 30 minutes and presented us with a bill for $560.! The proposal for the work came to $5895. When questioned about the high price of these bills, we were told just to give them to our insurance..they will pay!! We ended up giving him the $560. for an "emergency call" and found another electrician the next day who did the work for $1700. This company is dishonest and practises profiteering on people in emergency situations. What can we do to shut this crook down??