Noisy lifters after multiple ending head removals can cause clogged oil pump?

At one point on my 2000 Chev Monte Carlo, we discovered a cross threaded spark plug. Mechanic removed enging head to remove, prep hole for net plug hole. Then my lifters were noisy life never before. Take it back, the put new head on, and 6 lifters on the one side. Those lifters were installed 2 days after the head was removed because they had gotten the wrong ones. They had to restart the oil soak time. After thats ordeal was done, it was still noisy. I go back, and get another new head, and 12 new lifters (6 ea. side). That's 3 days of repais, and pick the car up and it's still noisy! Going into the engine that many times, clog the oil pump filter? Can that be why oil is not getting up to the top as how it sounds? If so, they should take care of that on their expense I would hope. Seemed to happen after they had vehicle 5 days from not having the right parts, etc. Thanks in advance! MR