Very useless no customer service

My sister and myself have been trying to close my mom's bank account as she passed away. The first branch we went to they said they had no tellers, but we were told to take her ID and one of our id's plus her death certificate. We waited 2 and half hour to be helped and then were told we need a letter from the magistrate. My mom has no estate and no money and during covid we must now go to the courts for a letter. I have tried to phone FNB as someone told me they didn't need that and closed a deceased person's account. But hence I can't get threw I have been trying for over 3 hours. Fnb has no customer service and don't give a dam l, mean while hlmy dead mothers bank account is still being charged bank fees etc. Seriously un impressed and no help