Returning Equipment

I need to return our old equipment as contract has ended. We took out another contract in partners name and new equipment was shipped out and is connected and working fine. We kept the box it came in as the packaging hinted that it could be used for returning old equipment. Other than that ive seen no address labels or formal paperwork on how to return the old equipment.

Today I receive an email chasing the return of the old equipment, so i start research the methodology and learn the return shipping label can be found by peeling back the label that has our home address on. Ive looked into this but this is not the case.

The email i received chasing the returns has a Yodel store finder link that returns a blank page, the email itself is of the no-reply type.

Ive logged into my account and can see nothing to do with returns nor how to print a label or to what address.

Lokking for some advice please.