RIDICULOUS PREMIUM INCREASES and LACK OF TIMEOUS RESPONSE TO COMPLAINTS

I took out Buildings Insurance in January 2023 with Auto & General. It's now 2 years later and on reviewing my premiums, I see that it increased by 25% at end-2023 and then again at end-2024 by another 25%. I HAVE NEVER CLAIMED on this Policy! The annual inflation rate is 4.4% so HOW can they give me a 50% premium increase in 2 years when I have never claimed? I phoned the contact centre and did not get a satisfactory response, I have emailed them and not had a response despite their auto-response stating that "they will respond within one working day". I am really quite shocked and about to change insurers.