tire and rotation

purchased 1 new steer tire for front of kenworth, had them balanced and and rotated when the drivers side tire was being put on the guy did not place it on all the way when the air was put to the lug and nut it slamed the wheel onto the hub making a big noise, once back on the road it was slinging oil, I change the oil cap it still leaked I took it off and peramtexed it and replaced it, it still leaked, I finally got it to the shop only to find the hub was cracked in 3 places, I took the cracked hub to Blacks tire and told them what happened and guess what the guy I talked to said there was no way they did it all he could say was tork would have broken parts not crack them and in his 30 plus years he never seen tork do anything like that, and that they couldn't have done that, well we never said torking did it we SAID the way it was slamed onto the hub with one lug nut just might have, we never had a problem till work was done there. You no longer have our business, with your service guys just not giving a crap about others property, we do not recommend there services they will break your stuff and blame it on something else.