Memory of phone

You cannot buy space fpr your phone. It will always have the amount of space it came with. You are buying space in Apple's synching service iCloud. There is a big difference. Check this link for an explanation...

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

The only way you can get more space is to delete photos, messages, apps, etc.. Be sure to save important photos and data to your computer. This video may help...

every month I pay for my 200 gb in iCloud,

Check -> Go to -> Settings -> your name -> iCloud -> if you see 50 GB (or 200 GB or 2 TB) then you have an iCloud subscription.

If you have an iCloud subscription, you will receive a monthly bill from Apple, check your email box.

but my telephone don’t see this GB

Check your iCloud storage on your iPhone.

• Go to Settings -> [your name] -> iCloud -> you will see the 200 GB iCloud+.

and write me that memory of my phone is full.

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.

What's the difference between device storage and iCloud storage?

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

Manage your iCloud storage

Manage your iCloud storage - Apple Support