Navworld Pretoria ignore the Consumer Protection Act and their own company's Terms and Conditions.

We bought a Zumo 59x Lithium battery from the Pretoria outlet of Navworld for R1099 on 12.923. We brought it home for the GPS device and it didn't work. My husband is an Electrical Engineer so knew how to put it in correctly. As it didn't work, it was returned to the Navworld shop within an hour, and the defect was demonstrated to the staff. We were told that they could not refund the money (thereby ignoring the Consumer Protection Act and their Terms and Conditions) but had to send it to Garmin for a technical opinion. They took our phone number and email address and promised to revert by Friday 15 September 2023. We heard nothing and when we went back to the shop today, 10 October 2023 a shouting match ensued and they still refused to refund the money as they are still waiting for Garmin! They also refused to show us proof that the battery had indeed been sent to Garmin. I don't care where it was sent, the Consumer Protection Act and Navworld Terms of Conditions say you need to refund the money if the goods are returned within 7 Days. I think an hour is acceptable. Why are Navworld operating outside of the law? Are they in financial trouble because they can't refund R1099? I phoned Navworld in Johannesburg on the number Pretoria gave me after 09h30 today. Every single department responds with a recorded message that "the ext you are calling is unreachable at the moment".