Q: i keep paying for storage

"i keep paying for storage in i cloud" is a statement of a fact, not a question so it is hard to guess what it is you are asking.

If you are wanting to downgrade your storage plan to a smaller plan (including to the 5GB free plan) or if you want to reduce the amount of data that you are storing so that you can then downgrade, the following may help: iCloud storage upgrades and downgrades - Apple Support

If it is something else, please reply with more details.