Pathetic service

Took our bike in (in one piece) for fault finding and repairs,3 months down the line.....not fixed ,no problem found and the bike is still the same with duck tape on the air filter box(***) . Charged me for a new throttle cable although it had a new one on already(have the invoice from Yamaha) where I bought it . When I got it back it was in pieces,how am I suppose to know if everything is there and we will be able to fix it after it has been butchered like this. Can not believe this is a Yamaha franchise....really pathetic