My bill is too high

We live in a one bedroom flat, which is electricity only, so during winter time when the heating was on, we paying about 180£ per month, and now, this month I barely put the heating on for 2 maximum 3 days, and the bill is 150£. How’s that? Is only 30£difference between winter and almost summer time? I send all the meters and everything but I don’t know what’s wrong, i know the price is up now, but still…

Have you checked the readings? 10p extra per kwh and double standing charge a day adds up pretty quickly