Disgusted by continued lack of service

It's been almost half a year since I asked for a letter renouncing executorship of my parents' will and nothing. The person in charge of getting this done, a Langa L, never answers his phone and never returns phone calls. How difficult is it to write a letter? So furious that my late mom's estate cannot move forward until and that I have to deal with such incompetence and lack of compassion at such a time. And, I left a complaint previously, which was not followed up as the email I was told to contact kept sending my email to spam, so Standard Bank didn't even receive the rest of my communications. Never going near Standard Trust again.