May I ask what charges you would want to dispute?

My memory usage has been constant, however, the price of my usage has increased, I would like to challenge and understand these values.

Looking at your project metrics I see a good amount of egress, this is likely where the increasing costs are coming from.

Increased egress is likely a cause of connecting to the database over the public network, and in your case, that is what you are doing.

Easily fixed by swapping the value of the DATASOURCE_URL to jdbc:mysql://${{MySQL.RAILWAY_PRIVATE_DOMAIN}}:${{MySQL.RAILWAY_TCP_APPLICATION_PORT}}/railway

This will use the private network and will eliminate all service to database egress fees going forward.