Hey guys need help re Stv visa what does this mean?

I have paid 10 days for the aq hotel my trip is from the 26th Feb to the 26th May I havent paid for the accommodation yet but have booked this from the 8th March to the 25th of may with flight on the mor in 26th but have sent them confirmation (I realised this is a day short would this cause the issue?) Is there any other proof of address i can give as dont have utility bill?

Stressing! Have 26 days until departure so am I okay?