No return of call or response to emails

After an extremely long battle with Dialdirect from January to mid March, i eventually received decent service from their customer service dept. Lo and behold, 3 weeks later i receive an email stating that my premium is going up by almost 45%!!! I have tried getting hold of Azia Nengwani who assisted me 3 weeks ago with messages and emails, but to no avail. No return call OR response to emails. Seems as though once again i am headed into a long journey with dial direct with no response or reply forthcoming