Garage Door Now

The service call price was $29 which seemed reasonable. After the technician went into my garage, literally repositioned a sensor and said 'That will be $150'. I only wanted a diagnostic and had no intention of paying that kind of money for a repair that still wasn't fixed. As of right now I still don't know if it's the garage door opener itself or the sensor. The company offered to send a technician for another $29 for a 'second opinion'. The technician refused to leave until this fee was paid. He tried a few things and I'm still not convinced the door is operating properly, so tried to upsell me to install a new one for up to $1100. The company is also refusing to refund me or even consider reducing this so-called service fee.