The worst service. My emails just get ignored!!!???

Simply the worst!!! My mother died 4 months ago, she dealt with our trust account. I now have to provide historical bank statements to SARS for this trust. Ive managed to get some historical bank statements for one of the bank accounts but for ages now the manager of the account has been unable to come back to me about the other bank account (which I only found out about because it appears as a credit on the bank statement). I don't think they care how long they take, all that happens is to ignore my emails. I've sent complaints but still no answer.