Appliance Repairman

I recently booked a service call with this company to fix the ice maker and water dispenser in my Kenmore fridge in the condo I just bought. They charged me over $300 for the repairs, but then told me after I agreed to pay this that there would be additional costs of $400. They look honest, reputable and professional on their webpage, but I've just learned the BBB reports frequent similar complaints, and had I done my due diligence and done better research I wouldn't be out $300 and still have a broken fridge. Learn from my mistake and avoid this company at all costs!