new shift shaft seal leaking

the problem was the mechanic changed the wrong seal lol but now both seals are new and everything is fine. I figured this out because I bought my own seal and took it to the shop with the car I showed the mechanic the seal and told him he might of used a cheap seal or you did it wrong so I want you to use this seal, so I gave him the seal and he said what is this! I laughed and said its the seal that you should have changed! he changed a little rubber seal for the kickdown lever thinking thats where it was leaking. I wont be going to that shop again!