Omnisure Harnessing phone calls, told to remove from list. Promised refund, didn't get it. Explained mother's dementia still calling! Internet

 Three times Omnisure has sold a auto warranty to my demential mother after we asked them to stop calling. They still call so I have swapped phone numbers with her. The are harnessing with the phone calls. They promised a refund in March again but still hasn't happened. Now when I call customer services 877_836_0411 the automated line keeps hanging up after telling me to call back due to high call volume. This k all those calls are from satisfied customer's... I doubt it. Is there no end to this!