In the book of Tasha paladin and cleric get this treat called Harness Divine Power:

Clerics:

Harness Divine Power. You can expend a use of your Channel Divinity to fuel your spells. As a bonus action, you touch your holy symbol, utter a prayer, and regain one expended spell slot, the level of which can be no higher than half your proficiency bonus (rounded up). The number of times you can use this feature is based on the level you've reached in this class: 2nd level, once; 6th level, twice; and 18th level, thrice. You regain all expended uses when you finish a long rest.

Paladins:

Harness Divine Power. You can expend a use of your Channel Divinity to fuel your spells. As a bonus action, you touch your holy symbol, utter a prayer, and regain one expended spell slot, the level of which can be no higher than half your proficiency bonus (rounded up). The number of times you can use this feature is based on the level you've reached in this class: 3rd level, once; 7th level, twice; and 15th level, thrice. You regain all expended uses when you finish a long rest.

But this two text give to me a lot of questions

1. If this treat used the Channel Divinity, why is only recover with a long rest when the Channel Divinite uses are geting back after a Short Rest too?
2. If this treat used the Channel Divinity, why the paladin has three uses of them when the paladin only have an used of Channel Divinity?
3. If this treat not used the Channel Divinity, why mention the use the expend of the Channel Divinity?
4. Or, maybe, this treat Isn't a Channel Divinite but consume a Channel Divinity, if this is the way is ment to use. I lost my Harness Divine Power until i make my a long rest but get back my Channel Divinity uses? If this is the case that mean the paladin has to take 3 short rest in order to use the three Harness Divine Power?

This power is a mess, somebody can explain to me how really works? Excuse me for my bad english but I am colombian

That ability is worded badly. Using Harness Divine Power does consume a Channel Divinity use. It is worded to prevent you from abusing short rests to recover too many spell slots.

As an example, a level 2 Cleric with this feature will have one use of Channel Divinity that recharges on a short or long rest. They may use their Channel Divinity to Harness Divine Power no more than once per long rest though.

A level 9 Cleric will have two uses of Channel Divinity that recharges on a short or long rest, but they cannot use it to Harness Divine Power more than twice per long rest.

thanks bro