Blown Transformers

Has anyone had any issues with the Video Doorbell Wired (the basic, non-pro version) blowing transformers? I installed it in November and it worked great until March when the transformer gave out. We had an electrician come out and replace it. It lasted a week before the new one died. We had him come out again and it lasted less than 24 hours. He made sure to install a 16-24V the second time, so there should have been more then enough power to supply the doorbell. This is becoming very frustrating for a device I have barely had 6 months!