Massive increases!

I have been a customer of Outsurance for many years and have never had a bad experience with claims etc. Recently I have received an email stating that my premium will increase with more than 20%! I thought this was unacceptable and immediately started getting quotes from other companies. I in fact got a quote cheaper that I am currently paying before the increase and better benefits as well. No access etc. I phoned Outsurance to complain about the high increase and they proceeded to say they can cancel the increase...why have the high increase in the first place? Outsurance should really start looking at this and be more competitive with pricing etc. I have forwarded the quote received and have not heard anything back. Outsurance, if you dont change the way you do business , you will be losing a lot more customers.