Today I got an email from Amazon asking me to pay a large amount of money for their services. I signed up on AWS two weeks ago to discover their platform, and tried following one of their tutorials. At no point did they disclose a price or indicate they will charge me. I gave my credit card info under the impression it was necessary for a free trial. I have contacted them with my grievances and am awaiting a reply.
Is there anything I can do to contest the bill? I am in the European Union, so hoping there is a law protecting consumers against such practices.