Account closure

Hi I created an account on Shopify to test it out. I am not happy with the products and processes of Shopify, and need to close the shopify account.

I tried to contact the customer support of Shopify, but could not find any customer support contact details.

Can someone suggest how to close the account permanently?

Shopify is expensive for me at this time. I am unable to pay. Can you help me with that, please?