In a statement, the company said it was confident the merger would go ahead in the first half of 2019, subject to approvals.
A statement of issues, as announced by the competition watchdog on Thursday morning, was a common interim step in the merger review process, setting out issues for further consultation, VHA added.
It said it would look at the issues raised by the ACCC and provide comprehensive responses in due course.
VHA chief executive Iñaki Berroeta said the company would continue to work with the ACCC on its review of the proposed merger.
“This proposed merger is a significant transaction, and we respect the need for the ACCC to make a carefully considered decision, so today’s announcement wasn’t unexpected,” he said.
“Customers will be the big winners of a proposed merger between VHA and TPG Telecom, and we’ll continue to engage with the ACCC as we have done over recent months.”
“Increased investment requires increased scale, and the proposed merger will enable the merged entity to take competition in the market to the next level.”
“The merged company will have significantly increased ability to invest in networks, new technologies, and competitive plans and products for Australian customers."
The merger is subject to approval by the Federal Court and TPG Telecom shareholders, as well as other regulatory approval processes.