What kind of actions did the British take to get money from colonists, and do you think the reactions of the colonists were justified?

The British used several methods to get money from the colonists. The British were concerned that the colonies were becoming more expensive to run after the French and Indian War ended. The British believed that since the colonists were benefiting from the British presence, they should share in the cost of running the colonies. For example, the British military protected the colonists from attacks from other nations or groups.
The British did a few things to get more money from the colonists. First, the British decided to more strictly enforce some of the trade laws that existed. The British cracked down on smuggling with the passage of the Sugar Act. This law lowered the taxes on sugar but increased enforcement of this law. With stricter enforcement of this law, the British hoped to gain more tax revenue.
The British also passed a few additional tax laws. The Stamp Act required the colonists to pay a tax when they bought newspapers or playing cards. They also had to pay a tax on legal documents. In 1767, the Townshend Acts were passed. The Townshend Acts placed taxes on imported products such as glass, tea, and other products.
The colonists weren’t happy with these taxes, and they took various actions to protest them. The colonists certainly had a valid point that they didn't have representatives in Parliament that could speak about and vote on these proposed taxes, which is a right that British citizens have. These taxes were one of the factors leading to the Revolutionary War.
https://www.history.com/topics/american-revolution/stamp-act

https://www.history.com/topics/american-revolution/townshend-acts

https://www.u-s-history.com/pages/h1211.html