Wrong roof sheets delivered

On Monday the 28th of September 2020 we visited Macsteel Belleville office and dealt with Sisa and we asked him for a quote on corrugated roof sheets and when the order came it was ibr that we can't use. They are refusing to take the sheets back that was returned on the same truck that was delivering it. Sisa was alone on the counter when we came and they line grew so it is possible that he didn't hear us correctly but my husband showed him the corrugated as well