Never had this issue before regarding any replacements car parts, but if you're not happy with the part they used, even if it's fitted you should be able to get your money back.
Had to use the car Just now. To start with couldn't get the car in 1st or 2nd, had to start in gear. After 100m I was able to change gear, which isn't easy.
Still can't get reverse, lets hope I don't need to reverse before it's fixed.
At low speed as soon as you dip the clutch peddle car cuts out.
At this point I'm not happy with their work or parts used.