Anyone out there dealing with a parent with dementia who shops the home shopping networks incessantly?

I am working very diligently to keep mom in her own home for as long as possible. She is an 84-year-old dementia (Alzheimers) patient in the mild to early mid range of her dementia journey. I am the only caregiver she will allow. She shops nonstop on the home shopping networks and buys the oddest things. Last big purchase was 3 huge carpet shampooers and 3 cases of the carpet shampoo that goes with it! Then, she bought 4 big boxes of stainless steel cookware. She no longer cooks; I bring in all of her meals. I am exhausted from my postoffice runs to return all of her purchases. The shopping networks have not been helpful in my efforts to stop this frantic buying. Attorneys have said not to worry about it. But I do. This is a predatory practice by these networks. My mother denies ordering any of these things, but I hear her ordering when I am over there. I take the phone from her and tell the customer service rep not to send it. I am frustrated beyond belief. Anyone else with this issue?