Bad service

I hand my ford focus in for a minor service,i asked them to check my left back wheel bearings, they told me there is nothing wrong with the bearing but they greased it i must cjeck i got flat spot on the tyres,i changed all 4 tyres still the noise was there we changed the wheel bearing and the noise is gone 1st of all its a sealed bearing you cant grease it. second the losen my battery they did not fasten the clamps on the battery so some wires burn into my battery,the pipe that comes from the turbo was broken they did not said a word my seats and stearing wheel was full of oil. but theyvcould take my money.R2890-00.dont know where they get the mechanics from.