The boiler wont light ? Baxi Solo 3 pfl 30/80?

Hello .... please help my boiler wont light i have water on constant and heating on constant , But my little blue flame wont come on on the boiler the fan out side doesnt blow out any hot air .... The lights are on but no one is home . The boiler on light is on ...The fan light is on ,...how can i light it again i tried turning it anti clock wise and waiting ten seconds but didnt work What did i do to it ? i cant afford a plummer ! Only hats and gloves which my children dont wear out side ,let alone in .... please any help might help thankyou