Loose MACO door handle

Hi,

The handle for my uPVC front door has become loose and no longer sits horizontally. I removed the handle today to take a look to see if there was a spring to be replaced, but there wasn't. I assume the spring action comes from the locking mechanism itself?

Do I have any options other than buying a new lock mechanism for the door?

Not knowing too much about uPVC doors, I'm not sure if the information I've given is enough to go on. Like the title says, the lock mechanism shows MACO on it.

Thanks for any help!