Misleading and dishonest when dealing with estates

Please be warned when dealing with Sanlam. My parents who are married in community of property had a will and testament with Sanlam, it was advice that I be the co-executor for their estate as the estate is simple. After some emails between us, six months after my father passed, I asked Sanlam to renunciate themselves. We were simply told no, they will honour my father's wishes. They then continued sending emails to my mother, without including me, and blatantly ignoring my emails to them. Phumla Hlungwani simply ignores any emails from me, and went so far as to confirm that she has received the executor's letter but cannot assist me with a simply query. However, she has not received this letter from the master as yet. She then sent a letter with the subject line for a late Mr Parker, which is also not my father, and again ignored the email. I sent another mail asking if they would reconsider renunciating themselves because we have lost all trust and faith in Sanlam and feel that they are unprofessional. After speaking to the financial advisor, complaining about this and the fact that Sanlam has appointed an evaluator for the property and assests (Which we were told is only necessary once the master requests this), I was informed that Phumla simply returned the first mail where they declined to renunciate. This was not even bothered to be sent to me or my mother. My father's wish was also that my mother does not have to deal with these types of problems, yet they refuse to honour those wishes. No one at Sanlam bothered to call and ask why we are unhappy with the service and no longer wish to deal with them. None of the things my father wanted is what is happening and we feel mislead. Yet Sanlam stands on "hounouring my father's wishes". Sanlam is going out of their way to add to the bills, yet they have also not yet received a letter of executorship from the court. If Sanlam cared and had our best wishes at heart, they would have attempted to find out what the problem is. This is only about money and they will do what they can to make my poor mother pay as much as possible, when none of this was necessary. May I also add, this is only to mention a few problems. Sanlam is not at all honourable and I regret referring my parents to them in the first place.