Your QS will be around 3-4, that's just the way it is with call only. The only thing the landing page is for is quick approval (as a verification URL). Your CPC seems a little low for pest control call only, as I have seen desktop clicks that high (fairly often). You may be hesitant to raise your bids any higher, but when done correctly, call only ads convert at a much higher rate than running all traffic to a LP. I would check your top and abs top IS% and bid accordingly. The better SERP placement tends to lead to better quality leads. Double check your search terms to make sure you aren't showing for bad traffic, especially since these clicks are so expensive. A lot of the profitability of a call only campaign comes from your negative keyword list.