Appliance Repairman

One of the guys came to service my washer. he accessed that it was probably the main control board. He told me that it would be $280 for a diagnostic, but he seemed convinced of the problem. I asked how much a main control board costs. he told me anywhere from $600 to $800. I said thanks, but no thanks. and payed the service charge. I looked online and found the main control boards actually cost around $150 to $180. I called customer service to complain and they said I had the wrong company and that i was not on file. Money wasted. I have never written a review on any company before this, but felt I needed to inform.