Complaint Review: sears and roebeck company automotive

To whom it may concern, i went back to sears because the tires that i purchased from them were defective. when i rotated them from the back to the front of  the car, the car  pulled very hard to the left. after 3 hrs in sears their mechanic confirmed that the car is pulling after he rotated the tires. I have road hazard on the tires. The manager said that they do not carry that particular tire anymore, so i will have to upgrade the tires and charge you the difference. Then I said "So you agree the tires are defective?" he said yes.I asked how are you going to charge me for defective tires and charge me because you do not carry them any more? also they are charging me to replace the  vaulves that not that old and to rebalance the tires that i already paid to have balanced. its not my fault the tires are defective. when I  stated all my concerns to the manager Bob, that i shouldnt have to pay for the upgrades or rebalancing of the tires. All he said is that i am getting a good deal..........i was stuck in a position where I had to get the tires changed because of the safety issues that the tires posed to me and my family if i kept driving on them, so i had them replace them and here i am.And for the record when i go past 50mph The car pulls again and shakes because they didnt speed balance the tires but left the old weights on the car..ripped off........anything you can do to help me in this matter would be deeply appreciated.