Big Ron'S Mower Repair

I Went in asked if he could make it go. Said it needed a belt or just tighten it. Got price of belt from Ron 20 bucks. Ok Ron's asked if I wanted blade sharpened? No, I said (what's he tring to do get more out of me?) almost 2 wks later he said. 118 for the job. Shocked I said what did you do? Gave it a tune up, and you didn't need that expensive part (belt 20$). My response was I didn't ask for a tune up. Ron said, Ohh yes you did! (in a very intimidating big male voice)....Ron went on to say...lets see here I charged you twice for this and oh wait I charge you twice for this too. That brings the total to 112$. My statement then was you take payments? Ron said NO. I asked do you take plastic? NO Ron said. I paid $118.00 he helped me load it in my truck and never looked me in the eye expect with shame. Oh yea, my mower run's it ran great before I took it in too it just needed the self propelled thing to work. I figured 50$ bucks for the mower that included getting a new belt and labor. Ron is a very unfair, bully bussiness man.