Flashing green light on hub3

As stated above my hub is flashing green and I have no internet. All was working fine this morning at 09.00 . I then noticed it flashing and coincidentally a virgin  van parked outside. When I spoke to him he had just finished connecting a new installation  at my neighbours house. Oh by the way I found a bad connection on yours and I’ve repaired it. Have you been having problems. No. Not until you messed with it. I suspect he did something while connecting my neighbours and couldn’t fix it. It’ll be ok in a minute he said, but didn’t bother to check and just drove off. Earliest I could get engineer out is Friday tea time although I have managed one for tomorrow. All due to their fault. Very annoying as I work from home and have a heavy internet based property. Very poor. 
Funnily enough my contact is up next month. Maybe time to move