No name help that cannot help- they do not even respond with a name

I saw an item in the store but they did not have my shoe size, I looked for it online but could not find it. When asking the online store for help, this is the response

Good day Thank you for your e-mail. Unfortunately our stock systems are not interlinked with those for in store items. We would advise you call any one of our Donna Stores to have them look up the item on their system. Kind Regards Online Shopping Department