Help

[Kimmy]

i was wondering how much would it be to get the speed o meter calibrated? Im tired of getting tickets and guessing how fast im really going, i tried calling toyota but the girls that answer put me on hold and will just transfer me to different dept. and im on hold for about 10-15 minutes and they hang up on me. I just don't want to take a drive out there and waste gas if they are not able to do anything about it since i lowered the car and put after market rims. Any info would be appreciated!! I just don't know what to do anymore.. lol

My rims are 17' my tires are 205/40/17 i know thats the right tire size