Rotten/off haddock

We made our haddock last night and it turned out to be off, smelled funny and tasted even worse. We reported this to your online talk to us email address, and the call centre called today to take down the information only to tell me that they would really need a receipt to be able to replace this product. Now my problem is I can’t recall who we purchased it from and then to try to find the receipt from who ever we bought it from now after possibly a month, who knows where this receipt is now. I feel this is really terrible as i had stated to her that we are regular buyers of this product whether is be yours or Sea Harvest, this is the first time we have had this issue before. I require a better response to this problem than we will investigate it but cannot replace this product. Where is your customer satisfaction then when there is this type of problems with this product!? I am at this stage not even willing to buy any further products from your production line because this is not a satisfactory response to this situation. I kept the product and it can be sent to you or collected for testing for verification. But come up with a better solution please!!