Power Steering Pump problems of the 2016 Nissan Altima

The steering wheel comes close to a frozen state, half way when turning left or right which is a serious safety matter. It happened at least 10 times in a month or two(sept/oct-2017). I took the car to the myatt Nissan in salisbury, nc. It took them 3 weeks to repair it during which I heard contradicting statements from them. After a week in their shop I was told by one person(west) that they were able to recreate the problem(when one of the technicians drove it). The service manager(roger) denied it never happened, but they changed the electrical steering pump for free anyway though it was 14,000 miles above the warranty. They even documented that they were not able to recreate the problem, but changed the pump any way. The reason I want to report it is of the contradicting statements and their effort to document it as non-issue, but changed the pump anyway. Clearly they are hiding something. Still not sure if the repair resolves the issue as I haven't driven it enough to validate for sure.