Master Tech Pest Solutions Unable to resolve scorpions Phoenix Arizona

Last Year I had Mastertech pest solutions out to sevice my home for a scorpion infestation I had. Originally I had one technician that would service my house monthly. Later in the year I had another younger technician out named Jordan. I was originally pleased with the pleasant and outstanding professionalism experianced by this company. The first technician I had was very polite and thourough however when I got this younger technician he seemed to be very fast and not very thurough at all and used some powder based substance that honestly looked like flour to me. ever since this technician used the flour substance in my block walls and around my doors my scorpion issue seem to explode like wild fire, which is funny considering that dusting was an additional charge of 20 dollars to hopefully work better than the standard service which i was paying 55 dollars bi-monthly for. I would like to warn people of this company as they seem to be very sneaky, they come on as pleasant to work with then they become very unprofessional. Speaking to the owner of this company he sounds very young and arrogant and un-willing to help with the issues I had, and only wanted to up sell me to spraying on a monthly basis at 40 dollars a service and then an additional 20 dollars every 2 or three months for dusting that seems to decrease the effectiveness of my services.