Mystery Shopping Guru (2:36)

Hidden Camera Part 1 (2:56)

Hidden Camera Footage Part 2 (3:03)

Hidden Camera Footage Part 3 (4:04)

When Customers Complain (3:46)

Return Policy Limitations (4:00)

Testing Tolerance for Bad Service (5:03)

No Exceptions to Store Policy (1:38)

Viral Video Complaint (2:57)

Twitter Test (4:49)

Third Worst (2:44)

Canada's Worst Customer Service (1:54)

Best Customer Service (1:46)

Credits: Canada's Worst Customer Service (0:46).