Can't they understand the patient is dead?

My mother passed away in March after spending about 2 weeks in a Netcare hospital, followed by a short period at a step-down facility. Her medical aid covered most of her expenses but there was a small amount outstanding. Since then I've had numerous calls about the money my mother owes them and I keep telling the callers to contact the lawyer dealing with her estate, but apparently nobody has bothered to do so. Today was the last straw when I got a call from a debt collection company over an amount of approximately R200. At least they seem to be taking me seriously as they've asked for a copy of her death certificate. But Netcare have put me through a lot of unnecessary stress when I'm still struggling to cope with my emotional loss.