Deceased members account STILL not settled after a year and four months

Please, PLEASE can Sizwe settle the outstanding amount on my deceased mom's hospital account which has been short paid for over a year and four months now. The hospital contacted me again today to say the outstanding amount must be paid and it's too much to cope with now. My mom diligently paid her medical aid year after year after year and now Sizwe's not honouring her medical bills, causing huge despair to me. Please can someone finalise this payment once and for all.