In this tale, the customer was very responsible, but the store was not.
The store sold a defective product, but did not stand behind it at all.
The store printed the receipt on thermal paper - not the customer's fault, and the customer shouldn't be expected to store receipts in a climate-controlled area, just in case Crappy Tire decides to be jerks.
To make up for Crappy Tire's poor-quality paper receipt, the customer brought in their credit card statement, showing the purchase. Still, the Crappy Tire people refused a reasonable return.
It's also important to see how an honest customer was treated by Jocelyn and Gary, and their poor attitudes and false accusations.
The low ratings of this store reflect that.
These are all aspects of the story that Crappy Tire refuses to address. This is one of the many reasons people say:
"Canadian Tire Sucks".