airflow appliance poor repairs, decieving, van nuys California

our refrigerator was not cooling, (49 degrees), called airflow, came out, charged $490.00 to replace control board, 2 and half months later 49 degrees again, called back out, said it needed an evaperator service to the tune of $180.00,  one month later, 49 degrees again, they gave us an estimate (with service call $ included,) of $400.00 to replace the control board, wait a minute!!! didnt we just replace that on the first service call???????  if agreed we would be over $1000.00.  i called them this morning (in good faith) and gave them option: refund $641.00 or fix it. told them i have a report filled out and waiting to hit submit to the better buisness bereau but will give them till noon today to resolve the issue. UPDATE TO FOLLOW...