Canadian Tire review: manager I spoke to regarding my issue

I bought a set of four tires from Canadian Tire in March of 2019, for my SUV. Immediately after having them installed, two dash lights would come on every time I drove it. This had not happened prior to having the tires installed. I took my SUV back to Cdn tire and a helpful manager took it in right away and I was told the mechanic had said it was just a matter of my truck adjusting to the new tires and it would go away on its own.
Now, October, seven months after purchasing the tires, nothing has changed. Dash lights still come on. I took it back to Canadian tire October 15 to get the issue rectified. I first spoke to a young girl who was very disinterested and didn't feel It had anything to do with what may have done while installing my tires and said she would get an estimate. I said I had no intentions of paying anything since none of this was an issue before Canadian tire got involved. She then asked me to sit and wait to speak to a manager. A "Manager" named David came to talk to me. He was also very disinterested and frankly seemed clueless and had no real idea what he was supposed to do. So clueless and out of his element in fact, that he passed it on to another manager, who was, in the end, very helpful. I would suggest that Canadian tire not waste any more money paying this person named David, as a manager. He clearly has zero customer service skills, is totally out of his element and should be working in a different job altogether. Because of David, I have no desire to return to the Canadian tire auto department, West Edmonton, as long as he is employed there.