My S22 is reverse charging the power bank

[Mashru]

I recently bought an S22. I have a power bank of 20000 mAh that supports 18w PD charging.

When I connect my power bank to the phone through c port, the power bank starting charging through my phone when I want the phone to be charged through the power bank.

Please provide some solution to this. 

[saireddyy]

Try usb 3.0 to type c

[Mashru]

Its charging with USB connecter on the power bank but its very very slow and not preferable