FNB LAPTOP

I bought a laptop for my son Online from FNB app. We later found out that the laptop is a chrome book which does not support most application that my son uses for his studies so we decided to consult with the bank first to see if anything can be done before returning it. They adviced us to return it within 7 days which we did. The laptop was not damaged when we returned it but after 3 days we got a call from FNB to inform us that the laptop screen is damaged. We disputed the matter as we sent the laptop without any damages, even the photos showed the laptop without any damages. They told us that the manager will call us. Later FNB deducts money from my account for a laptop that I don't have. I'm not satisfied with the way the matter was handled as I was under the impression the matter was still being investigated