I called the manufacturer today and managed to speak to someone sensible.
“Yes, I understand, it stopped working after only a few days. Not a problem, we will call your mother and arrange for a replacement to be delivered direct to her address and to pick up the faulty unit. I’m sorry she had so many problems trying to get through to customer services.”
So, within 48-hours, the manufacturer will arrange a replacement. Alledgedly.
We’ll see. Customers expectations are rarely met by customer service teams. There’s still a long way to go.