How can I offer 12-month 0% finance in my UK online store?

I want to offer customers finance, over 12 months 0% as you see many big stores doing. I have approached two companies. Hitachi needed me to turn over £1,000,000 before they would even consider my business. The other company that I cannot remember the name of needed me to turn over £1,500,000 before they would consider me.

I am not there yet so I need to find some other businesses that can offer me competitive finance as I think it could be a real key to furthering the success of my online store.

As a note I do use Klarna but they do not offer a 12 month finance, as far as I am aware.

If anyone have valuable information that would be great.

Thank you

Jacob