Real estate agents don't "sell" property, they advertise and facilitate the sale.
The sale takes place in the form of written contracts and deeds.
There's no legal term as a "short cut." Absent an easement or agreement of the property owner of permissive use, the access does not exist.
Permissive use usually isn't transferrable and can be revoked at any time.
What "TRIAL" are we talking about.
If it's going this far, you should be dealing with a lawyer regardless of which party you are in this mess.

