Conversely, one week six days until you can take to CISAS. You can request a deadlock letter from VM that avoids the need to wait eight weeks, in practical terms here, by the time you've wrangled that you'd probably be within hours of the eight weeks.
If you need to take the matter to CISAS, be clear on broken promises of installation dates, telephone callbacks, any instances of rudeness, unreasonable waits when calling and the like - these are aggravating factors if CISAS decide that compensation is due (conversely, if you went off on one at VM staff and stepped outside the boundaries of reasonable behaviour, they'd take that into account as a mitigating factor).
I'll flag this for forum staff to see if they can initiate some acceptable resolution - that's quicker than CISAS, but may or may not not have the outcome you want, if it doesn't then you still contact CISAS.