Maybe your father has to pay a lot of money to other people for debts and other expenses. And there isn't much money left over, after he pays for everything every month.
A lot of people have borrowed too much money from banks to buy houses, cars, and other things. And now they don't have enough income to repay their debts.
But sometimes parents also don't trust their kids to spend money well. You can buy things that can hurt you in some way such as cigarettes, alcohol, and drugs. Or you can buy clothes and make-up and dress in a way that your parents don't approve of.
You should ask your dad about the money. Perhaps he has changed his mind about giving you the money. But at least you will know the reason why.
okay I know you said you weren't spoinled but this question is a little bratty. I have never just 'been given' money. I babysit and save up any birthday or christmas money to spend with my friends during the summer. And if i am in need I ask my parents if they need any chores done around the house. Try that. (I am turning 14 next month btw)
Talk to your parents and ask them if there are extra chores around the house that you could do to earn a little money. Its not like you are getting nothing, after all they are feeding, clothing and housing you and they probably think you do not contribute enough to the family to warrant a summer allowance.
Get a job