ONT PON light flashing green

[Haggis0307]

Had fiber activated at our new address the other day and a new ONT was installed a few days prior. The PON light on the ONT is flashing green and we have no internet at all. Spoke to Sky who advised they have escalated to OpenReach to investigate and have to allow 72 hours. Is there any way to get an engineer out quicker than this? Worried we are going to be without internet all week and we work from home. Will Sky credit our bill for the time we're without service?

[StuXxxxx]

I don’t know if it helps any, but a flashing PON light generally, (but not always), means an authentication error.  That is, the serial number on the ONT doesn’t match the one on record.  Sky should easily be able to cross check this with Openreach.