Express Appliance Repair

he technician came to repair my fridge's ice-maker. Told me the main controller board was faulty. Paid and replaced it and still no ice. The technician came back, took the new part away, replaced the old part, and said he can't fix it, and that I will get a refund.
It has been 7 weeks of calling daily and still no refund.
Absolutely horrible customer experience, unprofessional and unresponsive.
Submitted official complaint.