Johnny K's Powersports

I took a ;paid of seadoos to them to be repaired. The replaced the spark plugs and said they were fixed. I said how does that repair the impeller they stated after a visual inspection that was the only thing they could find wrong. I said take a look again. They called me back and said yes nothing ... else wrong. They said their water tank was put away for the season so that was all they could do. I went and picked them up. $645 to winterize 4 stroke jet skis. I took them to the lake and took one out to see if it was fixed. It was not. I can not get over 5 MPH. it acts like impellor is broke. Same thing it was doing when i took it to them. No sense in ruining the winterized in the other ski.