3 executors no reply

I have been a client and still a client with standard bank for many years and so has my late mother. The issue I'm trying to deal with is the late estate department.

since January 2018 I have been emailing leaving messages and so have my attorneys for the executor to respond. The 1st executor has retired and no communication made. the 2nd executor has resigned once again no communication. I have now managed communicate with the new executor they said they would reply and handle the matter. I have given it 2 week and tried to phone and email and now no replies. I have had 2 different attorneys try and communicate with bank and still no reply. I'm sharing here maybe someone at Standard bank can please help.