Read through the (many) other similar topics on this forum and you will see you are far from alone with this problem.
The 'guarantee' that your installation will happen on the day you call is repeated over and over on here. The conclusion from past topics has been that this is nothing more than an automated date that just rolls over each day and it has no value at all as an indicator of progress.
You will be eligible for compensation for any delay
https://www.virginmedia.com/help/billing-and-payments/automatic-compensation
but VM regularly tries to dodge, or reduce, paying out as described in topics on here.
Keep very detailed notes in a timeline format as you go along (with accompanying evidence of messages, texts etc.) as this will be helpful if/when you need to go to arbitration to get paid any compensation due.
As for any means to move the installation process along, there have been hundreds of similar past topics on here without any particular proven means to make progress.
You may get installed imminently or you may have a very long wait but no one at VM will be able to give you any reliable answers that you can have any confidence in as to when your installation will actually happen.
