Poor service

Poor service from Momentum. My dad passed last year November. He had a Will made out and Momentum was nominated excutor of estate. I am not getting regular updates. I was told the Estate would take 3 to 6 months as my dad only had money in his bank account. He didn't have property or any accounts. They said in a usual case it take 12 to 15 months but my dad's estate was easy. I do not get any feedback. I was dealing with one consultant who handed it over to another and I feel I'm getting pushed around. All I need is regular updates and when can I expect this to be sorted.