Seems like a frequent question

From this fellow customer's point of view, 2 things -
First, Railway is a store that sells 4 things, each with their own price:

1. RAM

2. CPU

3. Network egress

4. Storage

When you buy something from a store and take it home, whatever you do with it is your responsibility, not the store's. In this case whatever services you set up and run on that infra you purchased from Railway are your responsibility.

Second -

I was billed more last month and I have not used anything, extra or different

What causes a bill to go up on Railway? Using more of the stuff on that list above

You don't need to touch the app or change anything for that to happen. And Railway can't be expected to be monitoring and keeping metrics on your services, its our own job to maintain our own applications

heres the menu with prices
https://docs.railway.app/reference/pricing#usage-pricing

and a calculator even
https://railway.app/pricing#usage-estimation

tldr;

Higher bill = whatever you're hosting used more of something.

Look in your apps and find out where more RAM, CPU, Net or storage was used.

Maybe a good analogy is buying electricity for your home. You're out of town and your bill spikes - wouldn't you first stop home and make sure you didn't leave the heat on the whole week before going straight to the utility company and asking what happened?

Beautifully said!

Are you from billing support or do you have any insights about my account activity?

Neither of us work for Railway, as a Hobby user would not be eligible for support from the team unless there is an issue with billing or the platform itself.

There is no issue with billing here, your service(s) used resources and you are being charged accordingly, as trogdor has said, you are responsible for looking in your apps and find out where more RAM, CPU, Net or storage was used, and why.

Building on trogdor analogy, the power company isn't going to be able to tell you what appliance you left running that caused the increased usage, since that is something the end user needs to figure out with their metrics, they are only going to charge you for what you used, Railway is the same, you have been charged for what you used.

I asked for billing because someone from railway sent an email saying I could find an authorised staff from the billing team. My question was for Railway's staff, I wasn't asking just so grown -up men could have more gamification points. You don't know my account or what I have in it, please let the Railway staff answer questions directed to them.

I asked for billing because someone from railway sent an email saying I could find an authorised staff from the billing team.

That was an automated message and does not mean your inquiry was a billing issue.

please let the Railway staff answer questions directed to them.

I'm sorry but Hobby users do not get support from the team for non billing or platform issues, yes this question is in regards to billing, but it is not a billing issue.

I'm a community moderator, I do not currently see any evidence of there being a billing issue, I'm sorry but I wouldn't be able to escalate this thread.

You where billed more because you used more.

Please look into your metrics and the resource cost per service breakdowns.