Software problems of the 2018 Volvo XC90

I purchased my 2018 Volvo Xc90 t6 awd (hereinafter, the �2018 Xc90� or �the vehicle�) in October 2017, through lease agreement. Shortly thereafter, I noticed that the fuel efficiency of the vehicle was well below the epa rating and warranted range, based on representations by the dealer at, and prior to, the time of sale. I took the vehicle to the dealer's service department, so the issue could be investigated further. The dealer reported there was a software update that addressed the problem, and that it would no longer be an issue. Subsequently, the issue continued to re-appear and the fuel efficiently continued to suffer. I again, on numerous occasions (between 5 or 6) between December 2017 and November 2018, took the vehicle to the dealer's service department. In each occurrence, except the final one prior to this complaint being filed, it was again reported that no issue existed or had been remedied with a software fix. Furthermore, in (or around) July of this year, the compressor (or another component controlling the hvac system in the 2018 Xc90) failed, whilst driving to houston, texas. The heat inside the vehicle quickly raised. This part was replaced in houston. In October 2018, I again, finally, took the 2018 Xc90 to the service department because (1) the check engine light came on; and (2) the electronic safety systems, such as the auto braking, had automatically engaged without any cars around the vehicle. The vehicle was also driving and handling in a strange manner. Fuel efficiency was again a concern. The service department had the vehicle for approx. Two-and-a-half weeks. They, ultimately, determined the fuel parts, were defective. They replaced these parts and noted it would be responsible for all prior fuel issues. However, they also stated a recall was issued, but my vehicle was not on the list. No recall notice exists with the NHTSA.