Google Ads: Emergency opening of locks

Project Description: A service where the probability of order is very high, as the demand of consumers implies urgent fulfilment of the order.
The task is to get from Google Ads 30 calls per day.
The average check: 1100 UAH / 2900 RUB
Some characteristics of the project:
1 . More than 30,000 (of which 3342 entered the RK) key phrases were collected and sorted. Each key phrase was selected manually. I do not regret this time and strength, because the negligent collection and sorting of key phrases is the main source of the "budget slide".
2nd All key phrases were segmented, grouped, and uploaded into advertising campaigns as much as possible.
Three Full web analytics, call-tracking is set. Every action of the customer is tracked on the site.
What indicators are achieved:
1 . There are an average of 38 calls per day. Each call is recorded in order to track how call center employees work.
2nd ROI > 400% per month.