Hi there @musunyima!
Cal here from Shopify, thanks for reaching out to us. I'm sorry to hear that you are looking to close your account. What problems did you encounter?
We wouldn't be able to close the account in full for you here, however, you should be able to close the account as shown in this guide, or by following the steps below:
1. Log in to the admin section of your store.
2. Click on Settings.
3. Next, click Plan and Permissions.
4. From there, Scroll down to the bottom of the page and click "Close my Store".
Let me know how this goes or if you run into some trouble!