Scenario: TV Purchase

Selma purchased a home entertainment system from a local TV and electronics store. A part of her purchase included a large 60-inch TV. Selma paid the store in full with her credit card. The store delivered the system to her rural home, and an employee of the store hooked it up. Picture quality, however, was poor at the time, and the employee suggested that the poor quality signal was due to issues with her internet service provider. Selma disregarded this and complained to the store owner. A qualified technician came out to Selma's home, and adjusted all that could be adjusted, but the change only marginally improved picture quality. A series of email complaints by Selma followed, eventually a senior technician advised Selma that she would never get full performance out of her system, as the internet service provider's technology in that rural area "had no chance of ever living up to the capabilities" of her entertainment system.The picture quality that she had seen in the urban store display could not be achieved in her home.

QUESTION: how you would advise the consumer on this situation? Can she return the TV and refund the whole amount? Refer to any legislation or rules applicable on this scenario.