Dmitriy (technician) came out within a day or 2 of the service request (August 15th, 2018). He replaced the defective burner for a glass-top stove. He told us there is a 6 month warranty. 3 months later the burner no longer works. I have emailed him 3 times, he claims he didn't get the email. I've called and texted the information to him, and he always says he will get back to me. This stove belongs to my elderly mother and I've been chasing him for this repair for almost 2 weeks now. We were happy with the initial service but this current experience is extremely disappointing.