The Victorian government and Conduent are reportedly in a legal stand-off over amendments to their contract, due to additional costs and technical work required for the upgrade.
Buses will replace trains on sections of the Hursbridge line for three weeks in October, for North East Link works and maintenance between Heidelberg and Eltham.
The Victorian government has blamed increased building costs for the additional $837m spend, with the project now more than $3bn over its initial budget.
This is of concern to many as the last time the station was rebuilt for a considerable sum of money no standard gauge platform was included which was a MAJOR oversight.