Hello, I am writing you cause, I bought storage before 1 week and still it say no storage??

1.

Try to free up iPhone device storage see this Apple articles below:

If you need more space for an update on your iPhone, iPad, or iPod touch

If you need more space for an update on your iPhone, iPad, or iPod touch - Apple Support

How to check the storage on your iPhone, iPad and iPod touch

How to check the storage on your iPhone, iPad and iPod touch – Apple Support (UK)

Clear Other storage on your iPhone or iPad

Clear Other storage on your iPhone or iPad - Apple Support

2. 

See -> What's the difference between device storage and iCloud storage?

What's the difference between device storage and iCloud storage? - Apple Support

See also the following Apple articles:

How to use iCloud on iPhone -> How to use iCloud on iPhone – Apple Support (UK)

Manage your iCloud storage -> Manage your iCloud storage - Apple Support

You have your iCloud+ plan storage -> 2 TB.

Renting iCloud storage does not add storage space to an iPhone or iPad. If you need additional space on the device, you will need to delete or move existing content.

NOTE: As you are using very little of the rented cloud storage, you could consider downgrading your plan.

What's the difference between device storage and iCloud storage? - Apple Support (CA)